 Bagh can still be considered as one of the best remnants and concentrated zones of British colonial architecture in the world.The square is also characterized by other historical landmarks including St. John's Church, which was one of the first buildings in Kolkata (formerly called Calcutta) and is modeled on St. Martin-in-the-Fields in London's Trafalgar Square.The church is home to beautiful stained glass windows and paintings as well as the mausoleum of Job Charnock, the man who founded modern Kolkata (formerly called Calcutta).