during the 13th century, the castle was almost entirely rebuilt, although historians have put forward two possible timelines for when this work was carried out. the conventional historical dating places the construction in the 1250s and 1260s, as a single programme of work consisting in the keep being demolished, a new gatehouse and four mural towers constructed and the outer ward reinforced with a stone wall and gatehouse of its own. paul remfry argues that the work occurred somewhat earlier during hubert's tenure, being carried out in two waves between 1229–1231 and 1234–1239. around this time the fortification is first described in the records as the "white castle", due to the white rendering applied to its external walls.