The Basilica of Saint-Sauveur de Dinan is a Roman Catholic church situated in Dinan, France. Historically, it is one of the two parish churches in the town, the other being Saint-Malo.
The building's initial constructions date back to the 11th century. Following a reconstruction campaign initiated in 1480, a northern aisle was added to the nave, and the apse and transept were entirely rebuilt. The façade's upper parts were also reconstructed. Due to an interruption, only the southern nave wall and lower façade remain from the Romanesque church.
This reconstruction effort evidences the town's dynamism at the end of the Middle Ages. The decoration of the radiating chapels is a testament to the fusion of Gothic and Renaissance styles in Brittany during the early 16th century. The collapse of the bell tower in 1547 prompted changes to the church. As a result, the decision was made to not vault the choir, which was instead covered by a panelled roof.
The church also became a site of Marian devotion due to the presence of Notre-Dame-des-Vertus, a 15th-century bas-relief formerly housed in the Cordeliers convent in town. Local veneration of this depiction of the Assumption of the Virgin led to the building being designated a basilica minor by Pope Pius XII on May 23, 1954.
In addition to this, the building also has an abundance of furnishings, which includes a cenotaph containing the heart of Bertrand du Guesclin.
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