The Principality of Wales was the territory ruled over by Llywelyn ap Gruffudd from 1267 to 1282, and afterwards by his brother Dafydd ap Gruffudd from 1282 to 1283. Following the conquest of Wales by Edward I of England of 1277 to 1283, those parts of Wales retained under the direct control of the English crown, principally in the north and west of the country, were re-constituted as a new Principality of Wales and ruled either by the monarch or the monarch's heir though not formally incorporated into the Kingdom of England. This was ultimately accomplished with the Laws in Wales Acts 1535–1542 when the Principality ceased to exist as a separate entity.