 Balerna, together with Riva and Uggiate, formed a "consorzio" (a common property group)in the 12th century.Politically the municipalities of Chiasso, Boffalora, Pedrinate, Seseglio, Novazzano, Coldrerio, Villa, Castel San Pietro, Vacallo and the Valle di Muggio part of the Pieve of Balerna.Starting in the 9th Century Balerna belonged to the count of Seprio.