Series 4.7, Purgatorio 7

Dante is sidelined for a while as  Virgil and Sordello talk about merit, and discuss the way no one in this region has the will to progress when it's night. And since it's soon going to be night, Sordello proposes to show them a nice place they can spend the night in: the Valley of the Princes. They go there and Sordello points out several of the rulers sitting together in the valley.