Cyfraith Hywel, also known as Welsh law, was the system of law practised in medieval Wales before its final conquest by England. Subsequently, the Welsh law's criminal codes were superseded by the Statute of Rhuddlan in AD 1284 and its civil codes by Henry VIII's series of Laws in Wales Acts between 1535 and 1542.
Modern depiction of Hywel Dda proclaiming the laws.
Medieval Kingdoms of Wales
A page from a 13th Century Latin version of the laws of Hywel Dda. NLW, Pen.28
An illumination of a Welsh judge (MS. Peniarth 28)
The Statute of Rhuddlan, also known as the Statutes of Wales or as the Statute of Wales, 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.
Page from Peniarth MS 41, a 15th-century manuscript of the Statute of Rhuddlan in Welsh
Rhuddlan Castle