Welsh Literature
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2007
...Early Works The earliest Welsh literature is preserved in...the 12th cent. However, the literature was highly developed well...so-called Four Ancient Books of Wales, are The Book of Aneurin...was a golden age in South Wales. Dafydd ap Gwilym, considered by many to be the greatest Welsh poet, broke the classical...social and political changes in Wales had marked effects, especially the anglicization of the Welsh gentry and the gradual decline...