 From the outset, the architect designed quadripartite rib vaults and flying buttresses, making it one of Normandy’s first Gothic buildings.The nave is fairly austere and is inspired by the Gothic architectural style of the Île de France, whereas the most recent parts of the building were constructed in the 18th century (the chevet, the lantern tower and the western façade) in Norman style.An earlier cathedral is presumed to have existed since the 6th century, as there was a Bishop of Lisieux from that time, but nothing is known of the earlier edifice.