In the 13th century the original apse was removed and the choir was extended to its present length.

The original apse of the basilica, however, was preserved, and seems oversized for the new church, whose nave was divided into three parts by means of columns.

The foundations and the stones and capitals of the original apse were still available, allowing for a relatively faithful restoration of the Romanesque main chapel.

The apse's original vaulting develops from a polygonal base to a quarter dome terminating in the rounded apse arch.

The original Romanesque apse was replaced in 1166 by an early Gothic chevet, complete with rosette windows and flying buttresses.

One unusual feature of All Saints, Brixworth, is the ambulatory running around the outside of the original apse below ground level.

The original three apses are of magnificent construction.

The original apse was round inside but rectangular on the outside.

It is Romanesque in style, and contains one of its three original apses.

The original shell-shaped apse at the North end of School gave its name to the Shell forms taught there and the corresponding classes at many other public schools.