 In 1955, the diocese's first African bishops, Kenyans Festo Olang' and Obadiah Kariuki, and Tanzanian (Tanganyikan) Yohana Omari were consecrated by the Archbishop of Canterbury, Geoffrey Fisher, in Uganda as Assistant Bishops.In 1964, John Sepeku became bishop of the newly-divided Diocese of Dar es Salaam (having previously been assistant bishop of Zanzibar).