CSI-Garrison Wesley Church (built in 1853) located in Trimulgherry is among the oldest churches in Secunderabad under the auspices of the Protestant Church of South India (CSI) within the ecclesiastical jurisdiction of the Diocese of Medak. Situated in Lal Bazar civilian area of the Secunderabad Cantonment, the CSI-Garrison Wesley Church is in near vicinity of the Military College of Electronics and Mechanical Engineering (MCEME), and the church has continued to attract not only its regular worshipers but also the new visitors from the nearby military stations of the Indian Army and the Indian Air Force through its regular Sunday Mass as well as its annual Good Friday, Easter and Christmas programmes.