St. Thomas church has had a choir ever since the church was founded in 1718. When the church was elevated to the status of cathedral, following the creation of the Diocese of Mumbai in 1837, a choir school was founded for the purpose of training singing boys for divine services. Till the late 1970s, most choristers came from Cathedral & John Connon School.
A specially crafted brass eagle lectern was donated to the church in memory of Lieutenant General HF Hancock, who served in Mumbai as Under Secretary to the government and as inspector of Railways. Later, he got posted in Kolkata, where he was Secretary of Public Works Department. Hancock died in Calcutta in 1887 at the age of 53. The eagle acts as a symbol of St John, one of the Twelve Apostles.
Memorial erected by the East India Company in memory of Lieutenant Colonel John Campbell, who bravely defended Mangalore for eight months when it was laid siege by the Kingdom of Mysore (supported by the French) during the Second Anglo-Mysore War (1780-1784). Campbell survived the siege but died from hardship at the age of 33. His memorial was made by British sculptor Charles Peart (1759–1798) in London, engraved on the pedestal (below the lion faces).
Memorial dedicated to John Watson, Superintendent of the Marines and Commander-in-Chief of the naval force that attacked Salsette in 1774. He participated in the Siege of Thane and was mortally wounded on 21st December 1774 and died from his wounds six days later on 27th December, at the age of 52. In 1777, the monument was erected in his honor by the East India Company.
St. Thomas church was inaugurated by the then Governor of Bombay, Charles Boone, on Christmas Day, 1718. At the time, it was referred to as the Church of Bombay. The church was consecrated on 7th June 1816 by Thomas Fanshawe Middleton, the first Anglican Bishop of Calcutta, and dedicated to St. Thomas the Apostle.
The southwest corner of St. Thomas Church has triple stained glass windows showing the figures of St. Thomas (in the center) flanked by the Archangels St. Michael (right) and St. Gabriel (left). Their respective names appear at the bottom of each panel.
St. Thomas Church was dedicated to the spiritual needs of the Anglican community living within Bombay Fort. The foundation stone was laid by Governor Gerald Aungier, who pressed for the establishment of the church. Among the historic treasures kept at the church is a silver chalice presented by Gerald Aungier to the Anglican Christian community in 1675.
James Trubshawe had ambitious plans for a complete makeover of St. Thomas Church, but the plan couldn't be executed in its entirety. Nevertheless, he recognized the emerging trend of Gothic Revival style and incorporated Gothic elements (like stained glass windows) to make the church appear visually consistent with Victorian Gothic buildings in Mumbai.
The two chairs used to sit during prayer services by King George and Queen Mary are marked with commemorative brass plaques with the date of their visit to St. Thomas Church. The royal couple had arrived in Mumbai onboard the steamship RMS Medina, and after spending a few days in Mumbai, they left by train to attend the Delhi Durbar.