There are three naves, supported by columns (arcs support). The central ship is higher than the sidewalks. And to point out that the ancient Romanian capsillas disappeared, over time, with the successive reforms of the Cathedral.

Today we only find some: the capitel in the second column of the central ship has carved a man who plays oliphound (medieval blowing instrument); Certain authors identify this figure with a character of the famous medieval poetry "Song of Roland"; In the last column, on the same side, one can still perceive the relief, already very erased, from another Romanic capital.