Vaison Cathedral, Romanesque cathedral in Vaison-la-Romaine, France.

The Notre-Dame-de-Nazareth Cathedral features a three-part choir structure with a rectangular central apse flanked by two semi-circular side chapels. Its windows combine pointed and rounded arches, filtering light throughout the interior.

The cathedral was built in the 11th century and served as the bishop's seat until the Concordat of 1801 abolished the diocese. This marked the end of several centuries as the region's main religious administrative center.

The cloister, built between 1010 and 1030, now serves as a lapidary depository. It holds the remains of the monument to bishops Guillaume II and Guillaume III de Cheisolme. Some capitals in the east gallery, carved with figures, date from the early 13th century, and several white marble shafts were taken from Roman ruins.

The cathedral stands in the lower town, close to the Roman bridge, and is reached on foot from the centre. The cloister, now a lapidary store, is entered through two small doors from the church. Since 1897 the building has served as the parish church, so visits may be affected by services.

The apse demonstrates an evolution from the horseshoe arch of the Late Roman Empire to the rounded arch style. This architectural shift shows how building techniques changed as the region moved from ancient to medieval times.