St. Mary's Church, Chennai
| C.S.I. St. Mary's Church | |
|---|---|
| Westminster Abbey of the East | |
| 13°04′43″N 80°17′12″E / 13.0787°N 80.2866°E | |
| Location | Fort St. George, Chennai | 
| Country | India | 
| Denomination | Church of South India | 
| Previous denomination | Anglican | 
| History | |
| Former name(s) | Presidency Church | 
| Founder(s) | 
  | 
| Dedication | Mary | 
| Consecrated | 28 October 1680 | 
| Past bishop(s) | V. Devasahayam | 
| Architecture | |
| Functional status | Active; Preserved | 
| Groundbreaking | 25 March 1678 (Lady Day) | 
| Completed | 1680 | 
| Specifications | |
| Length | 80 ft (24 m) | 
| Width | 50 ft (15 m) | 
| Administration | |
| Diocese | Diocese of Madras | 
| Clergy | |
| Bishop(s) | George Stephen Jayaraj | 
C.S.I. St. Mary's Church is the Anglican church located at Fort St George in Chennai, Tamil Nadu, India. It lies East of Suez and also the oldest British building in India. The church is popularly known as 'Westminster Abbey of the East'.