Simplify the following text for a Grade 6 native English-speaking person.
Original: Saint-Brieuc ( Breton : Sant-Brieg , Gallo : Saent-Berioec ) is a commune in the CÃ tes-d ` Armor Department in Brittany in north-western France .
Simplified: Saint-Brieuc is a commune . It is found in the region Bretagne in the CÃ tes-d ` Armor department in the west of France .