Complex sentence: To the best of common knowledge the building now dubbed the'Palombarone' was originally erected in 1580 as a primary residence for the local Archbishop, it was a property of the Roman Catholic Church.
Split into simpler sentences: To the best of common knowledge the building now dubbed the'Palombarone' was originally erected in 1580 as a primary residence for the local Archbishop. It was a property of the Roman Catholic Church.