during the rule of Abbot Roger de Norton (1263–90). On 10 October 1323 two piers on the south side of the nave collapsed dragging down much of the roof and wrecking five bays. Mason Henry Wy undertook the rebuilding, matching the Early English style of the rest of the bays but adding distinctly 14th-century detailing and ornaments. The shrine to St Amphibalus had also been damaged and it was remade. Richard of Wallingford, abbot from 1297 to 1336 and a mathematician and astronomer, designed a celebrated astronomical clock, which was completed by William of Walsham after his death, but apparently destroyed during the Reformation. A new gateway, now called the Abbey Gateway, was built to the Abbey grounds in 1365, which was the only part of the monastery buildings (besides the church) to survive the dissolution, later being used as a prison and now (since 1871) part of St Albans School. The other monastic buildings were located to the south of the gateway and church. In the 15th century a large west window of nine main lights and a deep traced head was commissioned by John of Wheathampstead. The spire was reduced to a 'Hertfordshire spike', the roof pitch greatly reduced and battlements liberally added. Further new windows, at £50 each, were put in the transepts by Abbot Wallingford (also known as William of Wallingford), who also had a new high altar screen made. Dissolution and after After the death of Abbot Ramryge in 1521 the Abbey fell into debt and slow decay under three weak abbots. At the time of the Dissolution of the Monasteries and its surrender on 5 December 1539 the income was £2,100 annually. The abbot and remaining forty monks were pensioned off and then the buildings were looted. All gold, silver and gilt objects were carted away with all other valuables; stonework was broken and defaced and graves opened to search for riches. The Abbey became part of the diocese of Lincoln in 1542 and was moved to the diocese of London in 1550. The buildings suffered—neglect, second-rate repairs, even active damage. Richard Lee purchased all the buildings, except the church and chapel and some other Crown premises, in 1550. Lee then began the systematic demolition for building material to improve Lee Hall at Sopwell. In 1551, with the stone removed, Lee returned the land to the abbot. The area was named Abbey Ruins for