The Abbey Church dates mostly from the 14th century, with a 15th-century north transept and tower extension. It was restored in 1790 by James Wyatt and in 1865 by Sir George Gilbert Scott. It is described in its listing text as "a church of major importance". The Chapel of St Catherine dates from the late 12th century and originally served the abbey. It has been changed little since its construction; during the 18th century the chancel walls were raised and the nave's west wall rebuilt, in 1901 it was restored, and about 1980 the stone slates on the north side of the roof were replaced with artificial stone. Milton Abbey School, built in 1771–1776 as a country house, was designed by Sir William Chambers and James Wyatt in the early Gothic Revival style. It largely replaced the abbey's domestic buildings. The abbot's hall and kitchen at Milton Abbey used to be the abbey's hall (built 1498) and dining room (17th century); they were incorporated into the country house (now Milton Abbey School) by Chambers and restored by Sir Gilbert Scott in the mid-19th century. A fire in 1956 destroyed internal features in the kitchen.