As the tallest structure in Fort, St. Thomas Cathedral once acted as a visual landmark. Over the years, the spire was remodeled to make it look more Gothic. It houses a belfry and clock tower. Though the bells are no longer operational, they are still in the spire, where they were installed in 1798. The clocks, however, are still operational.
St. Thomas Cathedral is the first Anglican church in Mumbai and one of the oldest structures within Bombay Fort. The church was built on an open space known as Bombay Green, which was later developed as Elphinstone Circle (Horniman Circle). The surrounding area is named Churchgate, after the city gate, which stood close to the church.
Stained glass works on the fanlight with a golden cross. A foliage motif paired with a blue band runs around the border. A fanlight is a semicircular or semi-elliptical-shaped window with glazing bars or tracery sets radiating like an open fan, hence its name. This fanlight is placed above the door on the entrance (west) to St. Thomas Church.