Medak Cathedral at Medak in Telangana, India, is the largest church in Telangana and has been the cathedral church of the Diocese of Medak of the Church of South India since 1947. Originally built by Charles Walker Posnett British Wesleyan Methodists, it was consecrated on 25 December 1924. The Medak diocese is the single largest diocese in Asia and the second in the world after the Vatican.HistoryMedak Cathedral is the seat of the Bishop in Medak for the Church of South India . The Cathedral is the largest of all churches in Telangana. The Cathedral also sees over the Diocese of Medak, which is the single largest diocese in Asia and the second largest diocese in the world. It was consecrated on 25 December 1924. Built by the British Wesleyan Methodists, the Cathedral is now under the jurisdiction of the Church of South India.