Tintern Abbey was founded by Walter de Clare, Lord of Chepstow, on May 9, 1131. Situated on the River Wye in Monmouthshire, it was only the second Cistercian foundation in Britain, and the first in Wales. It is one of the most spectacular ruins in the country and inspired the William Wordsworth poem "Tintern Abbey" and more than one painting by J. M. W. Turner.
See en.wikipedia.org/wiki/Tintern_Abbey