Complex sentence: Also found in the sixth Century fort at Tintagel were numerous remains of expensive pottery, glasswork, and coins from Visigothic Spain and the Byzantine Empire; it would have had to be a powerful state to have sustained trade with the Mediterranean.
Split into simpler sentences: Also found in the sixth century fort at Tintagel were numerous remains of expensive pottery, glasswork, and coins from Visigothic Spain and the Byzantine Empire. It would have had to be a powerful state to have sustained trade with the Mediterranean.