Cathédrale Saint-Cyr et Sainte-Julitte in Nevers

You're standing at Nevers Cathedral, dedicated to two martyrs: Saint Cyricus and his mother, Saint Julitta. It's the seat of the Bishop of Nevers. Take a walk around it, because this building has a real quirk. It has two choirs, one at each end. The western one is Romanesque, heavy and rounded. The eastern one is Gothic, tall and slender. Centuries of building history, all in one church.