Commenced in the 15th century and completed in the 19th, the Gothic church has a magnificent stained-glass window from the 15th Century, representing the life of Saint Cyr and his mother, Juliette; a painting by Jean Boucher (1575-1651) above the large portico; as well as six superb candelabra given by Louis XIV to the town and listed as an historic monument.
References:The historical centre of Briançon is a strongly fortified town, built by Vauban to defend the region from Austrians in the 17th century. Its streets are very steep and narrow, though picturesque. Briançon lies at the foot of the descent from the Col de Montgenèvre, giving access to Turin, so a great number of other fortifications have been constructed on the surrounding heights, especially towards the east.
The Savoyards made two raids into French territory in 1691 and 1692. As a result, Vauban was dispatched to inspect the frontier defences, which had been ill-equiped to deal with the attack from Savoy. He returned to the area in 1700 to check on the progress that had been made since his first visit. When Vauban visited Briançon, work on the defences had already started under a local engineer, Monsieur d"Angrogne in 1692.