Professor Robert Ture Olov Janse (August 3, 1892, in Norrköping, Sweden – March 1985, in Washington, D.C., United States)[1] was a Swedish archaeologist. He is notable for his excavation work at Đông Sơn between 1935 and 1939.[2] Though he originally argued a viewpoint for the European origins of Bronze Age culture in Vietnam, he reversed himself in support of Chinese origins after he started excavations at Đông Sơn.[3] Janse is characterized as having introduced order into the research of the history of archaeology in Mainland Southeast Asia.[4]