German Turfan expeditions
The German Turfan expeditions were four archeological expeditions to Turfan in Xinjiang, China, conducted between 1902 and 1914. They were initiated by Albert Grünwedel, a former director at the Ethnological Museum of Berlin, and organized by Albert von Le Coq.
Source: Wikipedia — German Turfan expeditions (CC BY-SA 4.0)