The nave is aisled, but the chancel and transepts are not. The new cathedral consisted of a double chancel with two transepts. The new transepts, aisles and nave were roofed with lierne vaults, enriched with bosses. The nave, choir, main tower and transepts are late Norman. They are found ornamenting the piers of the nave, choir and transepts. The narthex, the aisles, the large aisled transepts and numerous projecting chapels reflect this. High above the crossing of the transepts and nave is the lantern, or cupola. The width of the nave is and across the transepts is . Its shape was a traditional cross, with a long nave and short transepts. They were plead in the transepts and the portals to provide light to the nave. Three out of the four sections of the naves and transepts were also built. The transepts and tower arches are also early 13th century. The transepts each have a semi-circular entrance portico. It is a double-choir basilica with two transepts and a square tower at each crossing. There is a combination of rounded and pointed arches in the transepts and crossing.