Wales in the Middle Ages covers the history of the country that is now called Wales, from the departure of the Romans in the early fifth century to the annexation of Wales into the Kingdom of England in the early sixteenth century. This period of about 1,000 years saw the development of regional Welsh kingdoms, Celtic conflict with the Anglo-Saxons, reducing Celtic territories, and conflict between the Welsh and the Anglo-Normans from the 11th century. Source: Wikipedia (en)