Classes by Mordechai Dinerman

In the spring of 1096, crusading armies swept through the Jewish communities of the Rhineland, leaving devastation in their wake. This class traces how those events gave rise to rituals of memory. In the community of Worms, fast days were proclaimed on the 23rd of Iyar and Rosh Chodesh Sivan, accompanied by elaborate mourning customs. We’ll see how in 1716, when Rosh Chodesh Sivan fell on a Friday, rabbinic authorities clashed over davening Maariv early that afternoon. We conclude by tracing the demise of these fast days while noting how other rituals, such as the recitation of Av HaRachamim, have endured to this day. The First Crusade: The 1096 Massacres and the Rituals They Created

In the late 1920s, a Jerusalem rabbi cited an obscure passage describing a certain Rabbi Moshe’s pilgrimage to the Holy Land, including what appeared to be a visit to the Temple Mount itself. He seized on it as proof that going there was halachically permitted. This sparked a fierce debate over the passage: Was it even credible? Who exactly was this Rabbi Moshe? Did the text actually refer to the Temple Mount? And if a great rabbi really did go there, what would that mean for us today? This is the second installment in a series about going up onto Har Habayis.Did Rambam Actually Set Foot on Har Habayis?

Mechiras chametz is today a standard part of observing Pesach. But how did this practice come to be, and how has it evolved over the centuries? In this class, we analyze the relevant sources in Ashkenazic and Sefardic texts, revealing two distinct approaches to this topic. We’ll then find how the more the sale was refined to accommodate the seller, the more complications it introduced, requiring a series of complex adjustments and, eventually, triggering voices of opposition. All along, we’ll wrestle with a central issue—drawing the line between legal creativity and legal fiction. The Controversial History of Mechiras Chametz

There’s a well-known story about Sir Moses Montefiore going up onto Har Habayis during one of his seven legendary trips to Eretz Yisrael. But once you begin looking into it, you quickly discover that there are several versions of the story, each one telling it a bit differently: when he went up, why he did it, how he did it, and what the rabbinic community’s reaction was. As we’ll see, a great deal depends on who is telling the story. In this class, we’ll return to the sources and try to piece together what actually happened. This is the first installment in a series about going up onto Har Habayis. A Scandal on Har Habayis: The Montefiore Story

The Mishneh Torah printed in Venice in the 1570s was the product of a broad and deliberate program of censorship. Beyond removing the handful of references to the Christian founder, which we discussed in the prior class, the censors altered many other words and phrases. In some places, entire laws disappear; in others, the language is carefully adjusted to soften its force. In this class, we trace the principles that guided the censors and examine how their work left a lasting imprint on one of Judaism’s foundational texts. Censoring the Rambam: Part II

In October 1949, The New York Times announced a sensational discovery: an ancient manuscript of Mishneh Torah was discovered and it contained a long-lost provocative passage about the Christian founder. The headline sparked excitement, but the story was riddled with errors. In this class, we trace the real history of that controversial passage and examine when, how, and why it was cut by the censor. Censoring the Rambam

The class follows the paper trail in Rabbi Yosef Caro’s Kesef Mishneh to reconstruct how and when this major commentary actually came into being. After examining its printing history and the author’s stated purpose, the discussion turns to a key flashpoint: whether Kesef Mishneh represents Rabbi Yosef Caro’s final halachic word. We work through the evidence—internal cross-references, page numbers, textual features, and colophons—and ultimately arrive at a tentative conclusion. As one of the central commentaries on the Rambam, this investigation is a fitting and meaningful way to mark the start of the new Rambam learning cycle. Beis Yosef vs. Kesef Mishneh: Following the Paper Trail

Today, we explore Jewish life during Prohibition, when the manufacture and sale of alcoholic beverages were banned in the United States. While the U.S. government granted religious exceptions for wine, both the Reform and Conservative movements distanced themselves from this loophole, endorsing the use of grape juice instead. One contemporary posek passionately rejected grape juice, and we’ll examine the central arguments that shaped this debate. As we’ll see, this issue became a defining point for Orthodox Judaism in the early 20th century. Jews and Booze: Uncorking the Wine Debate During the Age of Prohibition

This class takes us inside the Jewish wine economy of earlier centuries. We will see communities enforcing price ceilings, outlawing seller collusion, and appointing assessors to protect community members from being overcharged. In some places, the system became so aggressively strict: monopoly-style selling rights, blind tastings, barrels sealed by wine assessors, community-owned measuring jugs, and stiff fines for anyone who tried to sell wine off the books. Wine: Blind Tastes, Price Controls, and the Most Regulated Wine Market You’ve Ever Seen

In the mid-1860s, a wave of rabbinic correspondence swept across central and eastern Europe as leading rabbis grappled with a vexing dilemma: how to respond to an antisemitic trial that touched directly on core points of Jewish theology. This case pitted antisemites against Jews, and within the Jewish community, enlightened progressives against traditionalists. Navigating this reality proved deeply contentious. Isaiah 53 on Trial: The 1863 Vienna Case That Split Jewish Leadership

In this final class of the series, we explore the Rebbe’s comments about Israel’s lopsided hostage deals during the late 1970s and 1980s, alongside the perspectives of other poskim during that period. The Hostage Dilemma: Part IV (Israel, 1979–1987)

In this class (third of a four-part series), we look at the halachic debate over freeing hostages as it unfolded in Israel during the 1970s. After the September 1970 triple hijacking, several poskim weighed in on whether it was permitted to meet the terrorists’ demands. The discussion resurfaced a few years later after the Yom Kippur War, and then again in the wake of the famous Entebbe raid in 1976. The Hostage Dilemma: Part III (Israel, 1970–1976)

Today, we’re returning to the topic of hostages in Jewish history. Last time, we spent most of our attention on the exceptions to the rule. This time, we’re looking at cases where the Mishnah’s ban on overpaying played at least a partial role in shaping actual halachic decisions and communal policy. And yet, as we will see, the overarching conclusion that we reached in the prior class will hold: overpaying often occurred. And it’s all a step closer to discussing this dilemma in the contemporary context, which we will do in an upcoming class. The Hostage Dilemma: Part II

This class takes up one of the most challenging moral questions in Halachah: how far should we go to redeem captives? We’ll look at how this issue unfolded in Jewish communities around the world during the fifteenth and sixteenth centuries—what actually happened, and how the poskim grappled with the Mishnah’s rule against paying more than market value. In a future class, we’ll revisit this topic in the modern context of Israel and its ongoing struggle against terrorism. The Hostage Dilemma: Part I

In this class, we’ll trace how the sale of mitzvos in shul began, why it caught on, and how it spread across the Jewish world. We’ll look at halachic debates about selling on Shabbos and Yom Tov and at the fiery disputes that erupted over bidding rights, auction miscommunications, and the occasional auctioneer mischief. We’ll also hear from the voices who opposed the practice and what their protests reveal about their communities and times. Bidding Wars: Inside the History of Selling Shul Honors

Ever feel like some piyutim just don’t flow right, as if the stanzas are out of order? Join us for a historical detective journey as we trace the piyut V'chol Maaminim and explore its possible connection to the enigmatic poet Yannai, whose true genius was hidden for centuries. We’ll uncover forgotten clues from the Cairo Geniza and reveal the song’s original, elegant structure. Finally, we’ll explore how key ideas from Chasidus unlock profound messages within its stanzas—a perfect way to enter the new year. We’ve Been Singing It All Wrong? Solving the V'chol Maaminim Mystery

Jews have been talking in shul for centuries, and rabbis and communities have tried countless ways to stop it. From twelfth-century Cairo to the Lower East Side in the early 1900s, this struggle has played out across Jewish communities worldwide. This class offers a light yet thoughtful examination of the history of “shul chatter” and how Jews have navigated it through the ages. The Saga of Shul Shmoozing: A Historical Look at Talking in Shul Across the Centuries

In 1827, Czar Nicholas I decreed that Jewish boys and young men be conscripted into the Russian army, a policy that shook Jewish life in Russia to its core. Communities debated and attempted various strategies to confront this crisis, and in that context, the Tzemach Tzedek was asked whether a particular approach was permissible. In this class, we’ll explore the historical backdrop, unpack the Tzemach Tzedek’s responsum, and work together to understand its meaning. The Cantonist Crisis

In this class, we will delve into the architectural anomaly of the “four halls” described in Yosifun’s account of the Beis HaMikdash. This description contradicts the sources in Chazal, and as we will discover, there is a fascinating history behind how this peculiar design came to be. The Four Halls That Never Were: A Critical Look at Yosifun’s Design of the Beis Hamikdash

What do you do when the government demands soldiers and says you have to choose who goes? That’s exactly what Jewish communities in the late 1700s faced when the Austrian-Hungarian Empire started drafting Jews into the army. In this class, we look at how the rabbanim responded to this impossible situation and uncover the moral struggle beneath their rulings. The Draft Dilemma: The Chilling Reality of Jews Deciding Who Gets Drafted

Can a Jewish community surrender one of its own to save the many? This class explores three cases from the 1600s and 1700s, where this wrenching question was brought before leading rabbanim. We’ll learn about the details of each case, the rulings the rabbis issued, and the Talmudic sources that shaped their decisions. The Dilemma of Handing Over One to Save Many

Today, we’ll examine the debate in Venice in 1630 over a communal ban against gambling. Local leaders moved to outlaw games of chance, but Rabbi Yehuda Aryeh Modena pushed back, arguing that the community had no right to restrict a Jew’s freedom in this area. Along the way, we examine the authorship of an anonymous 1595 dialogue on gambling, offering an overview of the halachic arguments and a window into public attitudes about his subject at that time. The story comes full circle as we turn to explore Rabbi Modena’s unique and candid autobiography. The Rabbi Who Couldn’t Quit Gambling

In 1725, Rabbi Zalman Hena published Shaarei Tefilah and sparked controversy by calling for a complete stop to the use of taam ha’elyon—the unique system of trop traditionally used for reading the Aseres Hadibros. Rabbi Yaakov Emden wasn’t having it and fired back forcefully in his Luach Eresh. This class unpacks their debate, the sources they cite, the Alter Rebbe’s position, and what we know about the two competing systems of trop for reliving Matan Torah. Up High or Down Low? The Battle Over the Proper Trop for the Aseres Hadibros

Today, we’re picking up where we left off in the story of chidush hasemicha. We’ll look at what unfolded after Rabbi Levi ibn Chabib pushed back against Rabbi Yaakov Beirav’s plan and how the controversy evolved in the decades that followed. We’ll dive into Rabbi Yosef Caro’s role in the debate and then turn to the remarkable mission in the 1830s, spearheaded by Rabbi Yisrael of Shklov, to find the Ten Lost Tribes in a bold attempt to revive semicha. The Great Semicha Controversy, Part II

After the Spanish Expulsion, a group of leading rabbis in Tzfas, led by Rabbi Yaakov Beirav, set out to revive semichah—the original form of judicial ordination that linked back to Moshe Rabbeinu. They planned to reestablish semichah through broad rabbinic consensus, but not everyone was on board. In Jerusalem, Rabbi Levi ibn Chabib strongly objected, raising serious questions about the halachic basis and the broader implications of the move. This class explores the halachic arguments, the historical backdrop, and the deeper motivations behind one of the boldest and most controversial rabbinic initiatives. The Great Semicha Controversy, 1538

There’s a long and painful history of the Gemara being censored in Christian lands, but in 1728, a draconian form of censorship led to the publication of a heavily redacted Maseches Berachos. A fierce debate erupted within the Jewish community: was it better to print a mutilated Gemara, or not to print it at all? In this class, we explore the rabbinic voices on both sides, the arguments they advanced, and actual examples of the edits. It’s a compelling glimpse into a community grappling with impossible choices under the weight of galus. Link to this 1728 edition: https://books.google.com/books?id=IW9iAAAAcAAJ&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=true The Doctored Talmud: Prague, 1728

Sometime in the mid-1400s, Rabbi Shlomo Duran of Algiers penned a remarkable teshuvah directed at a group of conversos in Spain. These individuals, who had been forced to embrace Christianity since the 1391 persecutions, had managed to maintain their Jewish faith in secrecy. Their question centered on how they could refrain from the worst forms of chametz on Pesach without drawing the suspicion of the authorities—an endeavor fraught with challenges. This teshuvah touches on many halachic elements regarding chametz and reveals the Marranos' historical struggles in mid-fifteenth-century Spain. The Marranos’ Secret Pesach

In the 1850s, a groundbreaking innovation was introduced in Galicia: machines to facilitate matzah production. What followed was a fierce and dramatic conflict that shook the Jewish world. Pamphlets were published on both sides, each defending its position with vigor, leading to intense debates over halachah, minhag, and economic policy. In this class, we jump into the heart of the controversy as it played out in the late 1850s—the first phase of this conflict—and then explore how later Chabad sources engaged with this issue. The Machine Matzah Controversy

The Alter Rebbe’s unique script for safrus has a rich and winding history. It has been inked, shelved, revived, and debated—and everyone seems to have an opinion. So, what is the story behind this ksav? What sets it apart? Why do some embrace it wholeheartedly while others remain unsure? This class explores its historical trajectory, some of its writing nuances, and the ongoing conversation around its adoption.Links to images:Megilah of Rebbe Maharash in Aguch library:https://hebrewstam.blogspot.com/2013/03/blog-post_120.htmlMegilah attributed to Rebbe Maharash, Carlebach family:https://yeshivasstam.com/maharashTefillin of the Frierdiker Rebbe:https://hebrewstam.blogspot.com/2012/11/blog-post_19.html#comment-formTefillin attributed to Reb Reuven Sofer, Gurary family:https://hebrewstam.blogspot.com/2016/01/blog-post_21.htmlThe Story of the Alter Rebbe’s Script

In the mid-12th century, the Almohads swept across North Africa and Spain, driven by a vision of a strictly unified Muslim society. For the Jewish communities under their rule, the choice was stark and unforgiving: convert, flee, or face death. Many outwardly embraced Islam while secretly maintaining their Jewish faith. A rabbi from afar denounced these covert Jews, insisting that their hidden devotion was meaningless. Rambam, however, fiercely rejected this view. In his Igeres Hashmad, he offered a scholarly and compassionate perspective, guiding his brethren through one of the most harrowing dilemmas in Jewish history. Rambam, the Almohads, and the Secret Jews

In the 1170s, the Jewish community in Yemen faced an existential crisis: a radical ruler forced them to convert to Islam, an apostate Jew spread anti-Jewish propaganda, and a self-declared Messiah sowed confusion. In response, the Rambam penned one of his most powerful letters, offering guidance and encouragement. As we approach the 44th Siyum HaRambam, we revisit this extraordinary letter, its historical context, and its enduring lessons. Rambam to the Rescue: His Legendary Letter to Yemen

In the 1470s, a series of outrageous blood libels were leveled against Jewish communities in the Germanic lands, including one in Regensburg. To secure their acquittal, the Jews of Regensburg needed an enormous sum of money—far beyond their means. The rabbis gathered in Nuremberg to strategize and ultimately turned to Rabbi Yosef Colon in Pavia with a pressing question: Could they obligate all Jewish communities in the Holy Roman Empire to contribute to helping the Jews in Regensburg? Rabbi Yosef Colon’s response is a masterful work of Talmudic analysis and a sobering reflection on the historical realities of the time. The Regensburg Blood Libel

On the fifteenth of Shevat, 1348, in the city of Tudela, a man named Yosef performed kidushin with a young woman named Belita. What began as a seemingly ordinary wedding ceremony quickly became a shocking controversy. People who were present asked Belita whether she was truly consenting, and instead of her confirming, it was her father who spoke on her behalf. Further investigation revealed that Belita had previously stated her refusal to this marriage not once but twice, and, in fact, was already married to her uncle Avraham. To complicate matters, she was also engaged to a third man! On the eve of the Black Death sweeping through Europe, this tangled web of relationships turned into a halachic dilemma that ultimately reached the desk of Rabbi Yehudah, son of the Rosh. The Scandalous Marriage, 1348

Rabbi Shlomo ben Aderes, the legendary rabbi and leader of Barcelona, received countless questions during his tenure, many of which have been preserved to this day. In this class, we discuss six compelling cases of tax disputes. They reveal remarkable insights into the political and economic realities of the time, the dynamics within Jewish communities, and their interactions with the surrounding non-Jewish world. Taxes and Tensions: The Story of Jewish Tax Disputes in Medieval Spain

The book known as Yosifun, cherished in traditional Jewish circles, and the books of Josephus, preserved in Greek and Latin by non-Jewish hands, spark challenging questions about authorship, reliability, and reconstructing the Jewish past. This class explores how rabbis throughout the ages evaluated these works, their role on the Jewish bookshelf, and how to navigate the apparent discrepancies between their accounts and the teachings of chazal. Josephus

The Books of Maccabees tell the dramatic story of the Chanukah revolt and the heroism of the Jewish fighters. But who wrote these books, and why were they left off the Jewish bookshelf? We’ll discuss the history of these texts, explore their reception among Jews throughout the ages, and probe the role they played—or didn’t play—in shaping Jewish memory of the Chanukah story. Lost Lights of Chanukah: Exploring the Books of Maccabees

When a shipwreck in the 1500s left families wondering about the fate of their loved ones, rabbinic authorities debated whether the wives of the missing passengers could remarry. This centuries-old question resurfaced in 1912 with the famous sinking of the Titanic, reigniting the discussion of applying Halachah in tragic circumstances. The Titanic Question: The Halachic Dilemma of Men Lost at Sea

We kick things off with seven fascinating stories from the teshuvos of medieval Spain, where we discover shul seats being treated like real estate: bought, sold, inherited, mortgaged—and sometimes the center of heated disputes. Then, we shift our focus to Ashkenaz, where this phenomenon is noticeably absent, suggesting a very different set of attitudes and conventions about shul seats. Finally, we dive into how the poskim tackled some of these disputes, applying Halachah to their contemporary realities. Benches, Bargains, and Bickering: Shul Seating in the Middle Ages

In the 1630s, pioneering Jewish immigrants in Brazil asked when they should daven for rain, given that their seasons were reversed from those in Europe. Their question sparked a fascinating rabbinic debate that takes us back to a dramatic showdown in 14th-century Toledo, which continues to resonate today. Join us as we explore how Halachah navigates the balance between tradition and reality. The Climate Clash: Rain, Rabbis, and Rulings for the Southern Hemisphere 

In 1848, a man in Jerusalem on a journey to Judaism was devastated when told he must desecrate Shabbos because, despite undergoing a bris, he wasn’t yet considered Jewish until completing the final step of immersion. His heartbreak ignited a halachic controversy, which we’ll explore in this class. We’ll uncover the identities of the key figures involved and delve into the moving story of a man willing to sacrifice everything for his newfound faith. The Warder Cresson Story

As we mark the 60th anniversary of the Lubavitcher Rebbe’s sichos on Rashi, we will dive into how the Rebbe engaged with some of the earliest print editions and medieval manuscripts of Rashi’s commentary. These unique editions often reveal variant readings of Rashi’s words, each with its own story to tell. Through this journey, we’ll gain a deeper appreciation for Rashi’s foundational commentary—and the Rebbe’s unique approach to understanding it. Links to the relevant manuscripts and prints: Vatican Library, Urb. Ebr. 8 https://digi.vatlib.it/view/MSS_Urb.ebr.8 Vatican Library, Vat. Ebr. 47 https://digi.vatlib.it/view/MSS_Vat.ebr.47 Reggio de Calabria 1475 https://www.internetculturale.it/it/16/search/detail?id=oai%3Awww.internetculturale.sbn.it%2FTeca%3A20%3ANT0000%3APARE078580 Guadalajara 1476 https://www.hebrewbooks.org/21188 Rome, circa 1470 https://www.internetculturale.it/it/16/search/detail?instance=&case=&id=oai%3Awww.internetculturale.sbn.it%2FTeca%3A20%3ANT0000%3APARE078579_2&qt=   Berliner edition https://www.nli.org.il/en/books/NNL_ALEPH990020823920205171/NLI   The Rebbe’s Rashi: Insights from Manuscripts and Incunabula Editions

Why has the Chabad community favored esrogim from Calabria? In this class, we’ll explore the backstory, diving into the halachic debates about grafted esrogim and why they matter. We’ll also take a closer look at the big discovery in 1955—when it turned out that even Calabria esrogim weren’t completely immune to grafting—and what that meant moving forward. We’ll unpack the history and the questions that still linger today. Rooted in Tradition: The Calabria Esrog Story

From the Cairo Geniza, we uncover an ancient Judeo-Arabic rabbinic essay offering unique insights into the history and development of the Jewish calendar, particularly the observance of the second day of yom tov outside the Land of Israel. As we delve deeper, this document emerges as part of a broader debate, addressing the Karaites’ opposition to the two-day yom tov tradition. By comparing this text with Rambam’s perspective, we’ll gain a deeper understanding of this critical issue and a window into a pivotal moment in Jewish history. Lost in the Geniza: An Anonymous Teshuvah on the Two-Day Yom Tov Debate

In this class, we will analyze four beautiful piyutim that we chant on Rosh Hashanah and Yom Kippur, uncovering some structural oddities along the way. As we raise questions and examine older prints and medieval manuscripts, we’ll uncover a story of mysterious censorship. While we’ll piece together what happened, understanding why it happened will prove to be more challenging.   Links: Machzor, Lublin 1551 ⁠https://www.nli.org.il/en/books/NNL_ALEPH990011638640205171/NLI⁠     Bodleian Library, MS. Michael 619 ⁠https://digital.bodleian.ox.ac.uk/objects/9e481d9a-06e6-41e8-ae36-a58d445a1ffa/surfaces/2e65041c-333b-4c90-9b54-c3566fbf73d8/#⁠     Bodleian Library, MS. Heb. e. 39 (Geniza) ⁠https://hebrew.bodleian.ox.ac.uk/fragments/full/MS_HEB_e_39_4b.jpg⁠     Bibliothèque Nationale de France, Hébreu 631 ⁠https://gallica.bnf.fr/ark:/12148/btv1b105392732/f25.item⁠     Bodleian Library MS. Laud Or. 321 ⁠https://digital.bodleian.ox.ac.uk/objects/268d1688-4523-4aed-962a-75f24c8cbfd0/surfaces/0b534075-2679-4a1e-88ca-998acfad9899/#⁠     Bodleian Library, MS. Michael 627 ⁠https://digital.bodleian.ox.ac.uk/objects/b3f2d1d5-ff07-4a6e-87ea-281c41957925/surfaces/ed999873-315d-46dc-a134-c50ca6f24362/#⁠     Bavarian State Library, Cod. Hebr. 69 ⁠https://www.nli.org.il/en/discover/manuscripts/hebrew-manuscripts/viewerpage?vid=MANUSCRIPTS#d=[[PNX_MANUSCRIPTS990001265200205171-1,FL50147206]]⁠     Basel University Library, MS. R II 2 ⁠https://www.nli.org.il/en/discover/manuscripts/hebrew-manuscripts/viewerpage?vid=MANUSCRIPTS#d=[[PNX_MANUSCRIPTS990001730950205171-1,FL61239499]]⁠     Bibliothèque Nationale de France, Hébreu 621 ⁠https://gallica.bnf.fr/ark:/12148/btv1b105420719/f70.planchecontact⁠     State Library Berlin, MS. OR 4200 ⁠https://www.nli.org.il/en/discover/manuscripts/hebrew-manuscripts/viewerpage?vid=MANUSCRIPTS#d=[[PNX_MANUSCRIPTS990000819800205171-1,FL55910250]]⁠ The Vanishing Verses: Curious Cases of Textual Tampering in Our Machzor

In this episode, we’re diving into fascinating early 16th-century woodcut images and priceless medieval machzor manuscripts to see how they portray the mitzvah of blowing the shofar. We’ll explore the unique details in these images that reveal interesting minhagim of the time, though some might leave us with more questions than answers. Let’s uncover the stories these images tell about our tradition. Links: Book on Jewish Confession (Nuremberg 1508) https://sammlungen.ub.uni-frankfurt.de/freimann/content/thumbview/6515799   Der Juden Spiegel (Cologne 1508) https://gallica.bnf.fr/ark:/12148/bpt6k1911061m/f39.double   Luzzato Machzor https://www.sothebys.com/en/articles/the-luzzatto-high-holiday-mahzor-1   Machzor – Bavarian State Library https://www.digitale-sammlungen.de/en/view/bsb00034975?page=82   Kaufmann Machzor - Hungarian Academy of Sciences http://kaufmann.mtak.hu/en/ms388/ms388-012v.htm   Machzor – Cambridge University Library https://cudl.lib.cam.ac.uk/view/MS-ADD-00662/127 Machzor – Austrian National Library https://www.nli.org.il/en/discover/manuscripts/hebrew-manuscripts/viewerpage?vid=MANUSCRIPTS#d=[[PNX_MANUSCRIPTS990001692630205171-1,FL21854414]] Art of the Blast: Shofar Blowing Customs in Medieval Manuscripts

In the 1860s, European Jewish communities faced a unique halachic challenge: the arrival of new chicken breeds from distant lands. As these exotic fowl entered the marketplace, rabbis debated their kosher status, igniting an adjacent discussion on how and why the turkey became accepted as kosher. Fowl Play: The Great Turkey-Chicken Debate of the 19th Century

In the 1970s, a Chabad journal in Israel published a story about the Alter Rebbe reversing a halachic ruling based on a dream, sparking significant controversy. This incident opens the door to a fascinating exploration of a practice that was surprisingly common among Ashkenazic rabbis in the 12th and 13th centuries—using dreams to guide halachic decisions. Dreams of Revision: The Role of Dreams in Altering Halachic Rulings

In the 1830s, Rabbi Tzvi Hirsch Kalischer penned an extensive letter to one of the Rothschilds, seeking his support for an ambitious plan to reinstate the korbanos on the Temple Mount. The rabbi contended that awaiting Moshiach was neither necessary nor prudent. This proposal ignited a debate among his rabbinic contemporaries, a discourse that continued well into the 20th century. Today, this story invites us to delve into many of the laws involving the Beis Hamikdash, a particularly fitting endeavor during the Three Weeks. The Rabbi Who Wouldn’t Wait: A Proposal to Reinstate the Korbanos

As we approach Gimmel Tammuz, marking the Rebbe’s thirtieth Hilula, we’re doing something different: a text-based class on an important talk by the Rebbe from Shabbos Korach 1988, a talk that captures a lot of the Rebbe’s hashkafah. The aim is to find inspiration and wisdom in his words, which can be applied to our daily lives and shared with others. Unconditional Love: A Commemorative Study of a Talk by the Lubavitcher Rebbe

Rabbi Yisrael Lifshitz, a well-known commentator on the Mishnah, included a provocative legend about Moshe Rabbeinu in his writings, suggesting that Moshe naturally possessed negative character traits. Over the following decades, some rabbis strongly opposed this legend, arguing that its claims were baseless and defamed Moshe’s revered image. In this class, we’ll talk about the origins of this controversial story, look at both sides of the debate, and explore why this account struck a chord with many Chasidic authors. The Provocative Portrait: Unveiling the True Face of Moshe Rabbeinu