During the English Civil War the castle was the only Royalist stronghold in the north of England until December 1645. After a three-year siege, a surrender was negotiated in 1645 between Oliver Cromwell and the Royalists. Cromwell ordered the removal of the castle roofs. Legend has it that during the siege, sheep fleeces were hung over the walls to deaden the impact from the rounds of cannon fire. Sheep fleeces feature in the town's coat of arms. Skipton remained the Cliffords' principal seat until 1676. Lady Anne Clifford (1590–1676) was the last Clifford to own it. After the siege, she ordered repairs and she planted a yew tree in the central courtyard to commemorate its repair after the war. Lady Anne's daughter, Lady Margaret Sackville (1614–1676), married John Tufton, 2nd Earl of Thanet (1609–1664) and the castle was then passed down through the Tufton family, becoming the seat of Lord Hothfield in 1871.