Arms of Mediaeval Principality of Wales T-Shirt

Traditional arms of the House of Aberffraw, rulers of the Kingdom of Gwynedd, attributed to Llywelyn the Great (d. 1240). Recorded in the Chronica Majora (c. 1250). Image attribution: Sodacan. The Principality of Wales (Welsh: Tywysogaeth Cymru) was originally the territory of the native Welsh princes of the House of Aberffraw from 1216 to 1283, encompassing two-thirds of modern Wales during its height of 1267–1277. 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.