 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.