 The town was unsuccessfully besieged by William the Conqueror, and taken by Henry II of England in 1164.In June 1173 Hugh de Kevelioc, 5th Earl of Chester, laid siege to Dol-de-Bretagne and captured the settlement as part of the Revolt of 1173–1174 against Henry.Henry, supported by an army of 20,000 mercenaries retook Dol-de-Bretagne the same year.