[Lorelai is showing slides of the road trip as Emily and Rory sit on the couch.]
LORELAI: This is Sever Hall, one of the oldest buildings in Harvard.
Sever Hall is an academic building in Harvard Yard designed by the famous architect H.H. Richardson, and built in the late 1870s. It was a gift from Anne Sever in honour of her deceased husband James Warren Sever. It is used for classrooms and lecture halls in the humanities, so this is where Rory would have listened to the philosophy lecture.