Complex sentence: The revenues from the manor at Ovington supported Itchen's nuns until 1284 when it was sold to the monks of St. Swithun's Priory, Winchester Cathedral; on the Dissolution of the monasteries, it was transferred to the newly formed Dean and Chapter of the Cathedral.
Split into simpler sentences: The revenues from the manor at Ovington supported Itchen's nuns until 1284 when it was sold to the monks of St. Swithun's Priory, Winchester Cathedral. On the Dissolution of the monasteries (1534--61), it was transferred to the newly formed Dean and Chapter of the Cathedral.