Glastonbury Abbey built
712 CE.
Shown on the map at 51.147°, -2.715°.
Glastonbury Abbey was a monastery in Glastonbury, Somerset, England. Its ruins, a grade I listed building and scheduled monument, are open as a visitor attraction. The abbey was founded in the 8th century and enlarged in the 10th. Destroyed by a fire in 1184, it was subsequently rebuilt, and by the 14th century it was one of the richest and most powerful monasteries in England. The abbey controlled large tracts of the surrounding land and was instrumental in major drainage projects on the Somerset Levels. The abbey was suppressed during the Dissolution of the Monasteries under King Henry VIII of England. The last abbot, Richard Whiting (Whyting), was hanged, drawn and quartered as a traitor on Glastonbury Tor in 1539. From at least the 12th century, the Glastonbury area has been associated with the legend of King Arthur, a connection promoted by medieval monks who asserted that Glastonbury was Avalon. Christian legends have claimed that the abbey was founded by Joseph of Arimathea in the 1st century.
Text from the Wikipedia article Glastonbury Abbey, licensed CC BY-SA 4.0.