Medak Cathedral at Medak in Telangana, India, is the largest church in Andhra Pradesh and has been the cathedral church of the Diocese of Medak of the Church of South India since 1947. Originally built by 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.
The church was built under the stewardship of the Methodist Christian, the Reverend Charles Walker Posnett, who was driven by the motto My best for my Lord. Charles Posnett had arrived in Secunderabad in 1895, and after first ministering among British soldiers at Trimullghery, had launched into the villages and had reached Medak village in 1896. In those days there was no railway to Medak (the journey of 60 miles (97 km) from Hyderabad had to be done on horseback – and Posnett could do it in a day) and in the whole Medak area there were hardly two hundred Christians, who were using a small tiled house as their place of worship. As the number of Christians increased, Charles Posnett raised a moderate structure in the Mission Compound in the shape of a church, but thought it unworthy, and early in 1914 laid the foundations of the present cathedral church, on 1,000 acres (4.0 km2) of land in Ghusnabad area. When the people of Medak district were suffering from famine between 1919 and 1921, Charles Posnett helped them by employing them in the construction of the church instead of running a free kitchen. Construction went on for 10 years. Charles Posnett consecrated the church in 1924, thanking God for mitigating the sufferings of the people. When several Christian groups became re-united as the Church of South India, the church became the cathedral church of the diocese of Medak in October 1947.