Benedictine monastery established on Thorney Island along the Thames in the mid-tenth century, traditionally attributed to St. Dunstan around 960 CE. King Edward the Confessor rebuilt and expanded the abbey between 1042 and 1065, consecrating the Romanesque church on December 28, 1065, shortly before his death. Henry III initiated a Gothic reconstruction beginning in 1245. The abbey has served as the coronation church for English and British monarchs since William the Conqueror in 1066 and remains an active Royal Peculiar under the jurisdiction of the sovereign.