Historical Monument 4 janvier 1971 (≈ 1971)
Official protection order.
Aujourd'hui
Aujourd'hui
Aujourd'hui Aujourd'hui (≈ 2025)
Position de référence.
Heritage classified
Protohistoric subterranean of the city of Grohan (cad. A 264, 265): by order of 4 January 1971
Origin and history
The Protohistoric Underground of Grohan City, located in Quessoy in the Côtes-d'Armor (British), dates from the Iron Age. This monument, whose location is estimated to be "a priori satisfactory", is identified by its approximate address: 5855 Grohan, 22120 Quessoy. It is referenced in the Mérimée database under the code Insee 22258, attached to the commune of Quessoy.
Ranked a Historic Monument by decree of 4 January 1971, this underground is one of the protected elements of French heritage. The available data are mainly from Monumentum and internal archives, but little detailed information on its use or architecture is available. Its classification specifically covers cadastral plots A 264 and 265.
At the Iron Age, protohistoric undergrounds in Brittany could serve as shelters, storage places or refuges. These structures reflect the construction techniques and needs of the communities of the time, often related to agriculture, crafts and defence. Their presence attests to a complex social organisation and advanced control of local resources.
