Prince of Wales regard as having been the last native Prince. On 16 September 1400, he was proclaimed Prince of Wales by his supporters, and held parliaments at Harlech Castle and elsewhere during his revolt, which encompassed all of Wales. It was not until 1409 that his revolt in quest of Welsh independence was suppressed by Henry IV. The tradition of conferring the title "Prince of Wales" on the heir apparent of the monarch is usually considered to have begun in 1301, when King Edward I of England invested his son Edward of Caernarfon with the title at a Parliament held in Lincoln.
King of Wales powers: Powys, Gwynedd, Dyfed/Deheubarth, and Morgannwg. With Wales now developing into a more consolidated entity, it ultimately set the stage for Gruffudd ap Llywelyn in the mid-11th century. Alliances with Anglo-Saxon dynasties and Vikings helped him unite the country, and even conquer land belonging to the English. "In 1055 he absorbed Deheubarth as well, thus becoming in effect King of Wales". John Davies states that Gruffydd was "the only Welsh king ever to rule over the entire territory of Wales... Thus, from about 1057 until his death in 1063, the whole of Wales recognised the kingship of and notably peaceful