St. Mary's Church, Chennai, Anglican church in Chennai, India

St. Mary's Church is an Anglican church inside Fort St George in Chennai, with a nave and two aisles, the nave projecting about 12 feet beyond the aisles to form the sanctuary, added in 1884 for the choir. Its walls are 4 feet thick outside and 3 feet between nave and aisles, and the roof is about four feet thick, rounded like a wagon's roof so cannonballs would ricochet. A white tower with a ribbed spire stands west of the nave.

The building originated during the British colonial period in South India and reflects European presence in Chennai. It was recognized as a Monument of National Importance, documenting this chapter of the city's past.

The church is known as the "Westminster Abbey of the East" and holds the weddings of Robert Clive and Margaret Maskelyne (1753) and of Elihu Yale, later benefactor of Yale University. Memorial plaques inside commemorate figures such as Barry Close, after whom the suburb of Ramavaram was named.

The building maintains set visiting hours and requires respect for ongoing services that occur at specific times. Visitors should expect that some areas may not be accessible during religious ceremonies and gatherings.

The altar piece is an unsigned depiction of the Last Supper, attributed to the school of Raphael, and was brought to Madras in 1761 as spoils of war after British troops stormed Pondicherry. The church also holds memorials to Barry Close, after whom Closepet (now Ramanagara) was named, and to Lt. Col. Joseph Moorhouse, killed at the siege of Bangalore.