St. Mary's Cathedral, Tiruchirappalli is a Roman Catholic church situated in Tiruchirappalli[1] district of Tamil Nadu state in the peninsular India.

This cathedral is dedicated to St. Mary who is also called as 'Mother of Good Health' here.

The church is constructed in a combination of Gothic and Romanesque styles.

[4] This cathedral is the episcopal seat of the Diocese of Tiruchirapalli.

[5][6] St. Mary's Cathedral is located with the geographic coordinates of (10°48′19″N 78°41′30″E / 10.805372°N 78.691547°E / 10.805372; 78.691547) at an altitude of about 99.51 metres (326.5 ft) above the mean sea level, in Tiruchirappalli.