barrel vault

Forty-eight columns with Byzantine and Greek capitals support the brick barrel vault of the nave.

The height of the interior, from the floor to the centre of the barrel-vault of the nave, is a little over seventy feet.

The nave of the church has a pointed barrel vault, and the aisles half-barrel vaults, but all the cross arches are semi-circular.

Sometimes the ceilings were horizontal, sometimes canted on two sides, and sometimes they take the form of a barrel-vault.

They were a variant of the barrel vault of the region preferred because less material was required.