Landmark 72, the other Edinburgh Castle, Craigmillar Castle, Edinburgh Craigmillar began life as the tower house that still forms the core of the castle. This was constructed around 1400, probably by Sir George Preston, one of a line of Prestons who played a large part in civic life in Edinburgh over several hundred years. It was his grandson Sir William Preston who, in the 1440s, was responsible for Craigmillar's most notable feature. He added the curtain wall that surrounds the tower house on three sides and creates the inner courtyard. In about 1510 Sir Simon Preston added a further layer of enclosure, erecting outer walls to form the outer yard and east and west gardens. Craigmillar Castle was captured by the English in May 1544 with its laird (another) Sir Simon Preston, who was also Provost of Edinburgh at the time. A programme of rebuilding in the 1550s included the construction of a new range of buildings along the east side of the inner courtyard. This was designed to provide more modern and spacious accommodation than was available in the tower house.