Far away on the most western point of Southern Wales stands the ancient Cathedral of St. David's, the most inaccessible, but the most interesting of the four Welsh Episcopal churches. The see was founded in the sixth century, and was known by the name Menevia. St. David was the reputed founder of the see, concerning whom there are many legends. He founded a monastery at Glyn Rhosyn, which became a fruitful school of saints and Celtic worthies, wrought divers miracles, and through him the Welsh Church extended its influence to Ireland, and also to Scotland and Northumbria. After his death troubles befell the monastery. It was plundered in 645, but recovered from the disaster. Here Asser, the biographer of Alfred the Great, acquired his wisdom. Then the Norse pirates frequently attacked the place, and on one occasion, in 1011, Eadric of Mercia wrought havoc here. But the see survived all these misfortunes, and here came William the Conqueror, who made an offering at St. David's shrine. For a time Welsh prelates continued to hold the see, but in 1115 Bernard, the first Norman prelate, chaplain of the queen of Henry I., was appointed to the see. Although he altered the constitution of the chapter, he made no alterations in the old church. The rebuilding was begun by Bishop Peter de Leia (1177-1198), but it is doubtful whether he personally did much to forward the work, as on account of his unpopularity he spent most of his time in England. However, the work progressed rapidly during his episcopacy, and was finished in the early years of the thirteenth century. After the fashion of cathedral towers, the tower of St. David's fell in 1220, and was immediately rebuilt. But it showed signs of again collapsing, and for centuries was a cause of anxiety, until it was made secure by Sir G. Scott in the restoration of 1866.