The Round Church Cambridge

The Round Church officially known as the Church of the Holy Sepulchre was built around 1130, making it one of the oldest buildings in Cambridge. It is one of only four medieval round  churches in England. The others are in a courtyard off Fleet Street in London, in Northampton and in the village of Little Maplestead in Essex.
These churches are unique in that the original body of the Church is circular, rather than a round tower being attached to a conventionally shaped building.