The Church of the Holy Sepulchre is the best preserved of only four remaining circular churches in England built by returning crusaders on the model of Jerusalem's Holy Sepulchre Church. It was begun in 1100 by Simon De St. Liz, the first Normal Earl of Northampton, probably in thanks for the success of the first crusade and his own safe return. It originally consisted of only the circular nave and a small chancel. A north chapel was added around 1200, and tower in the 15th century. The building was further enlarged to its present form in the 1860s.