trefoil arch

This large twin bay with a trefoil arch replaced in 1860 a rectangular opening, that replaced itself a small Romanesque bay in 1790.

Gothic trefoil arches and traceries are carried by classical columns.

Across these five upright divisions and in a straight line is thrown a great flattened trefoil arch joined to the back with Gothic vaulting.

The arch over it is a moulded trefoil arch, surmounted by a plain canopy of very simple and formal design.

In the second stage are four trefoil arches similarly supported; this range is continued round the facings of the inner wall immediately over the doorways, and forms the base of the windows.