Complex sentence: Under his governorship, numerous buildings were erected, a number of which are still standing today--these include part of Government House, the Château de Mon Plaisir and the Line Barracks, the headquarters of the police force.
Split into simpler sentences: Under his governorship, numerous buildings were erected, a number of which are still standing today. These include part of Government House, the Château de Mon Plaisir, and the Line Barracks, the headquarters of the police force.