1. Maps C.21.f.12(67) Reference (shelfmark): Maps C.21.f.12(67) Title: Main Building Nave [Philadelphia Centennial Exposition]. Photographer: Unknown Scope & Content: Genre: Architectural Photography View looking along the interior of the hall, apparently before the installation of exhibits. Stereo half, arched top. Collection Area: Map Collections Languages: Not applicable Date Range: 1876 Extent: 1 item