Complex sentence: Pech Maho has been nominated as an Official Historical Monument in 1961 by the French Ministry of Culture and acquired by the State in 1968.
Split into simpler sentences: Pech Maho has been listed since 1961 as a "monument historique" by the French Ministry of Culture. Vestiges de l'oppidum de Pech de Maho It was acquired by the State in 1968.