St. Mary's Co-Cathedral, Chennai
St. Mary's Co-Cathedral is a Catholic church in Armenian Street, Chennai, India. Constructed by Capuchins in 1658, it is one of the oldest churches in the former British India. For a long time Cathedral of the diocese it received the title of co-cathedral when the seat of the Roman Catholic Archdiocese of Madras and Mylapore was transferred to San Thome Basilica.