Entrance to the first floor assembly hall, called the "Great Hall", was through two large double doors at the east end of the vestibule. The Great Hall occupied the remainder of the floor space East of the vestibule. The room was flanked on either side by seven large, arched windows, with four similar windows along the east wall. An arched ceiling spanned some fifty feet in breadth, in the center. the floor was stained wood and the walls were painted white.