Sir Thomas Cullinan (12 February 1862 – 23 August 1936) was a South African diamond magnate. He is renowned for giving his name to the Cullinan Diamond, the largest diamond ever discovered, and as owner of the Premier Mine, now renamed the Cullinan Mine, from which the famous gem was extracted on 26 January 1905. He also gave his name to the nearby South African town of Cullinan. He was honored by the African Methodist Episcopal Church in Tembisa which named their church after him (Sir Thomas Cullinan AME Church). This was after he played a very big role towards building the church.