Le Vieux-Marché (French pronunciation: [lə vjø maʁʃe] ⓘ; Breton: Ar C'houerc'had) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.

Since the 6th century, a sanctuary dedicated to the Seven Sleepers of Ephesus existed in the town (possibly brought here by oriental monks).

Between 1703 and 1704, a chapel was built on top of it in the form of a Latin cross oriented towards the east.

Starting in 1954, he set up the pilgrimages modelled after typical Breton pardons which since 1955 have been also attended by Muslims.

[3] After the end of French Algeria, the bell of the Catholic cathedral in Algiers was hung in the church of Vieux-Marché in 1965.