Zion Church is one of the oldest churches in Tharangambadi (Tranquebar), a Danish settlement in Nagapattinam district in the South Indian state of Tamil Nadu. It is in the premises of Fort Dansborg, built in the land ceded by Thanjavur king Ragunatha Nayak in an agreement with Danish Admiral Ove Gjedde in 1620 and acted as the base for Danish settlement in the region during the early 17th century. The Church was built in 1701 by Rev. Bartholomaus Ziegenbalg and has records from the 18th and 19th centuries. He is believed to be the first Protestant missionary in India and the Church is believed to be the first Protestant Church in India.