Complex sentence: In the 12th century it was owned by local lords until 1778 when it became a property of the archbishop from Monreale Sanctuary of the Madonna of the Balzo near Mount Tricone was erected in 1678.
Split into simpler sentences: In the 12th century it was owned by local lords until 1778 when it became a property of the archbishop from Monreale. The Sanctuary of the Madonna of the Balzo near Mount Tricone was erected in 1678.