St. Mary's Church is often called the mother church of the Deccan and is one of Pune's oldest churches. Its design was inspired by St Martin-in-the-Fields in London, giving it a restrained British colonial look rather than the exuberance of many later churches in India.
Inside are memorials to British soldiers who served in the region. It is a worthwhile stop if you are exploring Pune Cantonment and want to understand the city's military and colonial layers.