Tassilo Adam (1878–1955) was a German ethnologist, photographer and filmmaker in Indonesia. Adam photographed palaces, rulers and royal sights in Java, Indonesia. He also worked in Sumatra and other locations in the Dutch East Indies. Adam donated photographs of the Batak people and other Sumatran ethnic groups, as well as notes on central Javanese dance to the Royal Tropical Institute in Amsterdam in August 1944.
Adam was born in Munich in 1878 to the German painter Emil Adam and an Italian mother. At 16 he studied in Vienna and decided to visit the Batak people in Sumatra. He worked on a Dutch tobacco plantation in Deli, Sumatra.
His experiences included illnesses such as malaria and dengue fever. He took a sick leave and returned to Vienna in 1912, marrying his wife Johanna.
He returned to the Dutch East Indies in 1914 and set up a dark room in Pematangsiantar. He photographed the Kubus, the people of Nias Island, and the Batak. He also collected Batak artifacts which he distributed to Dutch museums. He learned the Batak language and wrote a book on Malay-Batak grammar in 1948 with James Butler.
In 1921 he moved his family to Yogyakarta on Java where he established another photographic studio. He had three children in Sumatra, Lilo, Claus and Inge, and did portraiture and filmed and photographed royal dances and rituals with the permission of Sultan Hamengku Buwono VIII.
Adam documented Wayang Wong theatre, the Wayang Topeng, the Kuda Kepang (Horse Dance), the Serimpi, Bedoyo dances, and Javanese Shadow puppet shows. His photographs also captured the batik cotsumes used. Other events he documented include the circumcision of a royal prince of the Susunahan of Solo, Indonesia.