This digital collection presents a selection of historical maps and photographs of Tibet from the holdings of the American Geographical Society (AGS) Library. The collection consists of 1,090 images. It includes a unique set of 50 photographs of central Tibet and Lhasa taken by two Mongolian Buddhists, G. Ts. Tsybikoff and Ovshe Norzunoff, who visited Tibet in 1900 and 1901. The photographs represent the first photographic images of Potala Palace in Lhasa and other Tibetan monasteries. In addition, over 1,000 images of Tibet have been drawn from the extensive photographic collection of Harrison Forman. Photojournalist and explorer, Forman undertook three expeditions to remote areas of northern Tibet between 1932 and 1937. The photographic collection is supplemented by four plans of the city of Lhasa and six historical maps of Tibet selected from the map collection of the American Geographical Society Library.