Amonst the most expensive of English Heritage's sites to eneter yet strangely disappointing,, Its place in English History, where the practices of the Irish and Roman Catholic Churches were unified (date of Easter and the style of monastic tonsure) at the Synod of Whitby in 664 at the double monastery (monks and nuns) under Abbess Hilda amkes it uniquely special. Founded in 657 it was wasted several times by the Vikings but and remained desolate for 200 years before being as a Benedictine monastery after the Conquest. Rebuilt in 1220 the Abbey was dissolved on 15 December 1539 and destroyed in 1540.