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Bisaccia is an Italian town and comune, population 4,382, situated in the province of Avellino. It borders the communes of Andretta, Aquilonia, Calitri, Guardia Lombardi, Lacedonia, Scampitella and Vallata.
Bisaccia's Castle, made by the Lombards, was repaired by Emperor Frederick II, who went to hunt in the woods near Bisaccia. Famous writers as Torquato Tasso and Francesco de Sanctis visited Bisaccia.
After the Irpinia earthquake in 1980, a new town was built near the historic centre.
Bisaccia's language is the Bisaccese dialect.