The Musée des Univers Perdus ("Museum of Lost Universes") is a museum and bookstore specializing in works from lost civilizations, such as Ancient Rome or Gallifrey. The building has a very impressive exterior, and yet the inside is even larger, with a high enough ceiling to have its own weather systems on occasion; the precise means with which this was accomplished are a source of debate among the PPC. Its floors are marble, and it has a ceiling of glass.