St. Martin-in-the-Fields is an English Anglican church located at the north-east corner of Trafalgar Square in Westminster, London. It was built from 1721 to 1726 in the neoclassical style, and it was dedicated to St. Martin of Tours. St. Martin-in-the-Fields became one of the most famous churches in London, and it serves as the parish church of the British royal family, 10 Downing Street, and the Admiralty.