Sven Anders Hedin (19 February 1865  26 November 1952) was a Swedish geographer, topographer, explorer, photographer, travel writer, and illustrator of his own works. During four expeditions to Central Asia, he discovered the Transhimalaya (once named the Hedin Range in his honor) and the sources of the Brahmaputra, Indus and Sutlej Rivers, Lake Lop Nur, and the remains of cities, grave sites and the Great Wall of China in the deserts of the Tarim Basin.