In a dream William had repeatedly measured out a length for the abbey of 500 feet, a foot for each year that his descendents would rule but each time when the distance was checked it was only 315 feet so 315 feet was chosen as the length of the church.
The monastery abbey was dedicated to Saint Martin and was consecrated in 1076, but building work was not completed until 1094 when it was reconsecrated in the presence of William Rufus, seven bishops and the Archbishop of Canterbury. The first monks to arrive at the abbey were from the Benedictine abbey of Marmoutier near Tours in the Loire Valley.