Simon de Senlis, Earl of Northampton, was responsible for making Northampton a
Norman stronghold by building
Northampton Castle (now destroyed) and a town wall (approximately on the site of the present inner ring road). It is also probable that he was responsible for the building of
All Hallows Church by the market place in the centre of Northampton and the church of the Holy Sepulchre to the north. In around 1096, Simon de Senlis joined the
First Crusade to the
Holy Land. There he would have seen the
Church of the Holy Sepulchre near the centre of
Jerusalem. He would have seen it as a round church supported on eighteen columns or piers with an
ambulatory around the perimeter on the west of the church, and the well attested site of
Christ's tomb at the centre. There would have been four
apses at each of the cardinal points, and on the east side there would have been a facade, so that the east apse was accessible directly from the
rotunda. After restoration, this church is what would have remained of a 4th-century church built by
Constantine I. It is likely that after his return to Northampton, Simon de Senlis built the "Holy Sepulchre" in Northampton, ca 1100. It is approximately half the size of the church in Jerusalem. The original church of about 1100 had a round
nave of 8 columns, supporting a
triforium. An ambulatory ran round the perimeter. The remains of a
Norman window in the present nave, however, suggests that the original round church had a
chancel to the east, probably apse-ended. A North aisle was added circa 1180 and second North aisle was added circa 1275. During the early 15th century, a South aisle was built, the triforium of the round nave was replaced by a clerestory, and a Western tower was added. ==Original building==