A church was location in the late 4th century, and eventually a cathedral was established in Rouen as in Poitiers. It was enlarged by St. Ouen in 650, and visited by Charlemagne in 769.
All the buildings perished during a Viking raid in the 9th century. The Viking leader, Rollo, founder of the Duchy of Normandy, was baptised here in 915 and buried in 932. His grandson, Richard I, further enlarged it in 950. St. Romain's tower was built in 1035. The buildings of Archbishop Robert II were consecrated in 1065. The cathedral was struck by lightning in 1110.
A suitably gothic sky for a gothic cathedral.