Osismii

port city in the Finistère department, Brittany, France

Guingamp (; ) is a commune in the Côtes-d'Armor department in Brittany in northwestern France. With a population of 7,115 as of 2020, Guingamp is one of the smallest towns in Europe to have had a top-tier professional football team: En Avant Guingamp, which played in Ligue 1 from 2013 until 2019. The Guingamp station is served by high-speed trains to Brest, Rennes and Paris, and regional trains to Brest, Lannion, Carhaix, Paimpol and Rennes.

Carhaix-Plouguer (; ), commonly known as just Carhaix (), is a commune in the French department of Finistère, region of Brittany, France. The commune was created in 1957 by the merger of the former communes Carhaix and Plouguer.

Saint-Pol-de-Léon (; ) is a commune in the Finistère department in Brittany in north-western France, located on the coast.

Huelgoat (; meaning "High Forest") is a commune in the Finistère department of Brittany in northwestern France.

Landéda (; ) is a commune in the Finistère department of Brittany in north-western France.

Plounéventer (; , ) is a commune in the Finistère department, Brittany, northwestern France.

'''Ploulec'h''' () is a commune in the Côtes-d'Armor department of Brittany in northwestern France.

Laniscat (; ) is a former commune in the Côtes-d'Armor department of Brittany in northwestern France. On 1 January 2017, it was merged into the new commune Bon Repos sur Blavet.

Audierne (; ) is a commune in the Finistère department of Brittany in northwestern France. On 1 January 2016 the former commune of Esquibien merged into Audierne.

thumb|upright=1.5|Coins of the Osismii. The Osismii or Ostimii were a Gallic tribe living in the western part of the Armorican Peninsula (modern Brittany) during the Iron Age and the Roman period.