It's a theatre, not an amphitheatre, for drama, not gladiators.

Some surviving posts and panels on the northern arm.

The main apse has a prominent bench. The southern apse projects beyond central one, but the northern one seems to lose its way - it doesn't complete its arc.

Beyond the nave is quite an elaborate narthex.

The surviving plaster facing has incised decoration. The baptism pool is centrally placed.

Lined with grey marble slabs below, opus signinum above

Dramatic red and white marble screen base, with sockets for the posts and panels.

A curious feature. Was it an earlier church that was so holy that a larger one was built round it, or a later, 'squatter' one built in the ruins? I went without my trowel! But its off-centre position suggests the latter.