24°51′07″N 67°01′48″E / 24.852°N 67.030°E / 24.852; 67.030

Holy Trinity Cathedral is the seat of the Church of Pakistan, Diocese of Karachi,^[1] situated on Fatima Jinnah Road, near Zainab Market, in Karachi, Pakistan.

Established in 1844^[2] and built in 1855, the Holy Trinity Church located on Fatima Jinnah Road, Karachi, is one of the first major churches^[3] built in the area. Designed by the Captain of the Bombay Engineers, John Hill,^[4] the church had a nave stretching 115 feet, followed by a tower^[5] standing at 150 feet tall. The church was built with buff colored Gizri stone and the architectural design made it unique. The church followed a Romanesque^[6] layout which made it stand out compared to the buildings located around. At the top of the tower, since there were no lighthouses, it was given beacons to help ships^[7] in the Karachi Harbour. In 1904, Captain John Hill and Chief Engineer John Brunton, reviewed the cathedral and found that the foundation was showing signs of weakness and removed^[8] the top two stories, giving the tower a new height of 115 feet. During World War I, the churches tower was used as a signaling^[9] station, and soon in 1970 the pitched roof from the original design was replaced with barrel vaulted roof.^{[citation needed]} Since the church is a former garrison church for the British military, it was designed to accommodate 800 worshipers^[10] and memorialize British servicemen who died in various campaigns^[11] and their history.

• Church of Pakistan
• Circa-1890 photos of Trinity church at Sindhisaan.com
• Trinity Church, Karachi at the British Archives