Complex sentence: During the night of 7th-8th August 1987, a fire destroyed the ceiling of the church; it was rebuilt some years later thanks to the "Sovrintendenza ai Beni Culturali" of Sicily.
Split into simpler sentences: During the night of 7-8 August 1987, a fire destroyed the ceiling of the church. It was rebuilt some years later thanks to the activity of "Sovrintendenza ai Beni Culturali" of Sicily.