Langdon Warner (1881–1955) was an American archaeologist and art historian specializing in East Asian art. He was a professor at Harvard and the Curator of Oriental Art at Harvard's Fogg Museum. He is reputed to be one of the models for Steven Spielberg's Indiana Jones. As an explorer/agent at the turn of the 20th century, he studied the Silk Road. He was elected a Fellow of the American Academy of Arts and Sciences in 1927.

The Mogao Caves, also known as the Thousand Buddha Grottoes or Caves of the Thousand Buddhas, form a system of 500 temples 25 km (16 mi) southeast of the center of Dunhuang, an oasis located at a religious and cultural crossroads on the Silk Road, in Gansu province, China. The caves may also be known as the Dunhuang Caves; however, this term is also used as a collective term to include other Buddhist cave sites in and around the Dunhuang area, such as the Western Thousand Buddha Caves, Eastern Thousand Buddha Caves, Yulin Caves, and Five Temple Caves. The caves contain some of the finest examples of Buddhist art spanning a period of 2,000 years.