Cyfraith Hywel in the context of "Welsh independence"

Owain ap Gruffydd (28 May 1354 – 20 September 1415), commonly known as Owain Glyndŵr (Welsh pronunciation: [ˈoʊain ɡlɨ̞nˈduːr], also Glyn Dŵr; anglicised as Owen Glendower) was a Welsh leader, soldier and military commander in the late Middle Ages, who led a 15-year-long Welsh revolt with the aim of ending English rule in Wales. He was an educated lawyer, forming the first Welsh parliament under his rule, and was the last native-born Welshman to claim the title Prince of Wales.

During the year 1400, Glyndŵr, a Welsh soldier and Lord of Glyndyfrdwy had a dispute with a neighbouring English Lord, the event which spiralled into a national revolt pitted common Welsh countrymen and nobles against the English military. In response to the rebellion, discriminatory penal laws were implemented against the Welsh people; this deepened civil unrest and significantly increased support for Glyndŵr across Wales. Then, in 1404, after a series of successful castle sieges and several battlefield victories for the Welsh, Glyndŵr gained control of most of Wales and was proclaimed by his supporters as the Prince of Wales, in the presence of envoys from several other European kingdoms, and military aid was given from France, Brittany, and Scotland. He proceeded to summon the first Welsh parliament in Machynlleth, where he outlined his plans for Wales which included building two universities, reinstating the medieval Welsh laws of Hywel Dda, and build an independent Welsh church.

Welsh law (Welsh: Cyfraith Cymru) is a semi-autonomous part of the English law system composed of legislation made by the Senedd. Wales is part of the legal jurisdiction of England and Wales, one of the three legal jurisdictions of the United Kingdom. However, due to devolution, the law in Wales is increasingly distinct from the law in England, since the Senedd, the devolved parliament of Wales, can legislate on non-reserved matters.

Welsh law has been generated by the Senedd since the Government of Wales Act 2006 and in effect since May 2007. Each piece of Welsh legislation is known as an Act of Senedd Cymru. The first Welsh legislation to be proposed was the NHS Redress (Wales) Measure 2008. This was the first time in almost 500 years that Wales has had its own laws, since Cyfraith Hywel, a version of Celtic law, was abolished and replaced by English law through the Laws in Wales Acts, enacted between 1535 and 1542 during the reign of King Henry VIII.

Hywel ap Cadell, commonly known as Hywel Dda, which translates to Howel the Good in English, was a Welsh king who ruled the southern Welsh kingdom of Deheubarth and eventually came to rule most of Wales. He became the sole king of Seisyllwg in 920 and shortly thereafter established Deheubarth, and proceeded to gain control over the entire country from Prestatyn to Pembroke. As a grandson of Rhodri Mawr through his father Cadell, Hywel was a member of the Dinefwr branch of the dynasty. He was recorded as King of the Britons in the Annales Cambriæ and the Annals of Ulster.

Hywel is highly esteemed among other medieval Welsh rulers. His name is particularly linked with the codification of traditional Welsh law, which were thenceforth known as the Laws of Hywel Dda. The latter part of his name (Dda, lit. "Good") refers to the fact that his laws were just and good. The historian Dafydd Jenkins sees in them compassion rather than punishment, plenty of common sense and recognition of the rights of women. Hywel Dda was a well-educated man even by modern standards, having a good knowledge of Welsh, Latin and English.

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.

The Principality was formally founded in 1216 by native Welshman and King of Gwynedd, Llywelyn the Great who gathered other leaders of pura Wallia at the Council of Aberdyfi. The agreement was later recognised by the 1218 Treaty of Worcester between Llywelyn the Great of Wales and Henry III of England. The treaty gave substance to the political reality of 13th-century Wales and England, and the relationship of the former with the Angevin Empire. The principality retained a great degree of autonomy, characterized by a separate legal jurisprudence based on the well-established laws of Cyfraith Hywel, and by the increasingly sophisticated court of the House of Aberffraw. Although it owed fealty to the Angevin king of England, the principality was de facto independent, with a similar status in the empire to the Kingdom of Scotland. Its existence has been seen as proof that all the elements necessary for the growth of Welsh statehood were in place.

The Statute of Rhuddlan (Welsh: Statud Rhuddlan), also known as the Statutes of Wales (Latin: Statuta Walliae or Valliae) or as the Statute of Wales (Latin: Statutum Walliae or Valliae), was a royal ordinance by Edward I of England, which gave the constitutional basis for the government of the Principality of Wales from 1284 until 1536.

The statute followed the Conquest of Wales by Edward I and the killing of the last Welsh prince to rule the whole Principality, Llywelyn ap Gruffudd in 1282. The statute introduced English common law to Wales, but also permitted the continuance of Welsh legal practices within the Principality. The statute also introduced the English shire system to the Principality of Wales. Prior to the statute, the Welsh principalities were ruled by Welsh law and the native Princes of Wales.