Reading Abbey, a Cluniac monastery, was founded in 1121 by Henry I, the son of William the Conqueror, in remembrance of his own son William, who had died tragically at sea. Little remains now of what was once the largest and one of the most prestigious abbeys in England. John and Lindsay Mullaney have made a special study of the abbey and give a detailed account of the background to its foundation, its cult of St James the Great, its architecture, music, art and liturgy.