Complex sentence: Trentham Priory is said to have originally been the site of Anglo-Saxon nunnery, built in the first years of royal Christianity in Mercia at'Tricengeham' (Trentham).
Split into simpler sentences: Trentham Priory is said to have originally been the site of Anglo-Saxon! Anglian nunnery, built in the first years of royal Christianity in Mercia at'Tricengeham' (Trentham).