The plan shows a central circular auditorium. The seating is arranged in part of this circle, on a curve. There are surrounding walls but two spaces in them with long corridors, widening as the lead further from the audience. They are at about 45 degrees to each other. At the end of each of these corridors is a picture room. This is where the diorama displays were shown. Opposite the two picture corridors are some rooms used for admission, with a vestibule and several sets of stairs marked.