1. Maps C.21.f.12(65) Reference (shelfmark): Maps C.21.f.12(65) Title: Main Building, South Avenue [Philadelphia Centennial Exposition]. Photographer: Unknown Scope & Content: Genre: Architectural Photography Interior view looking along the gallery, apparently before the installation of exhibits. Stereo half, arched top. Collection Area: Map Collections Languages: Not applicable Date Range: 1876 Extent: 1 item