The
Principality of Wales (
Welsh:
Tywysogaeth Cymru) existed between 1216 and 1536, encompassing two-thirds of modern
Wales during its height between 1267–1277. For most of its history it was "annexed and united" to the English Crown. However, for a few generations, specifically the period from its foundation in 1216 to
Edward I's completion of the conquest of Wales in 1284, it was
de facto independent under a Welsh
Prince of Wales, albeit one who swore
fealty to the
King of England.