The original, early 12th century cathedral had perhaps a single nave and a large apse, and was in Romanesque style.

It has an impressive spire at the front and large apse in the Sanctuary.

The church ends with a large apse.

From here the chalk foundations of the choir, still with aisles to north and south, ran eastwards to end in a large apse.

The north ends in a large apse.

The central, larger apse was used as a sanctuary and the choir was then moved westwards into the nave.

At the east it has a large semi-circular apse and Rhenish capped towers (338).

It ends in large apses, and has a series of chapels opening into the aisles.

The elevated choir ends with a large apse.

It featured a large apse in the centre, flanked by two smaller apses.