Scandalous error: calendar reform and calendrical astronomy in medieval Europe - Philipp Nothaft

The Gregorian calendar reform of 1582 has its intellectual roots in the European Middle Ages, when the reckoning of time by means of calendrical cycles was a topic of central importance to education and learned culture. This talk will focus on several previously unknown source texts and the way they shed new light on the various factors that fostered or inhibited the calendar reform debate in the later medieval period, from c. 1200 to 1500.