Gundulph is said to have hitroduced the architectural ornaments of the ecclesiastie* he into tl.rtresses, both within side and without. Most or the Norman castles had a tidily earyed door-ease or portal. as the remains cal Arundel and Berkeley anwly testify. The windows were decorated with mouldings, f•eqnently sculptured. Castle-Rising, Norfolk, and Norwich abound in admirable specimens of Norman , arcades and mouldings.
The great tower of entrance was built at the foot of the artificial mount, from which was a sally-port, with stone stairs leading to the keep. It contained the portcullis and drawbridge affixed to the archway, and several spacious chambers. In point both of the formation of the mount and keep, and their connection With the entrance-tower, the remains of Tunbridge, and the more perfect state. of Arundel castle, exhibit a singular resemblance. The walls were pro tected by strong buttresses, and the round towers had a central space left open, to admit light and air. At Arundel, the corbel-stones, which supported the beams of timber, are still to be seen. See CAsmn.
The well - authenticated buildings of Norman con struction, erected from beffire A. a. 1100 to 1150, are the abbeys of Abingdon, Ile:tiling, and Cirencester, destroyed ; Nailing, Kent ; Tewkesbury, nave, aisles, transept, and west front ; Alalinsbury, nave and west front ; Bnildwas, Salop ; St. llotolph, Colchester ; Bolton, Yorkshire; Winborn
minster, Dorsetshire ; Castle-Acre, No•fitlk ; Dunstable, Bedtbrdshire; St. Cross, 1 lants; Romsey, fants; Furness, Lancashire, the most ancient parts; Llindisthrne, Northum berland; Yorkshire; Lanercost, Cumberland ; Sher bourn, Dorset ; Southwell, Nottinghamshire ; Kirk stall, Yorkshire, nave. Of those DOW named Tewkesbury, Winborn minster, St. Cross, llonisey, and Sherbourn, are now used as parochial churches.
From A. v. I t 55, the style of architecture practised by the Normans began to be mixed with new forms :111d decorations, and was at length superseded by that much more elegant and lofty style of building, improperly denominated Gothic.
The principal works that may be consulted in Norman architecture, are the Archwoloyia, Carter's Ancient Architec ture of England, Britton's _Antiquities of Great Britain, and Dalaway's English, Architecture.
.NOSINtiS Or SEEPS, the projecting parts of the tread board or cover, which stand betitre the riser. The nosing of steps are generally rounded, so as to have a semicircular section, and, in good staircases, a hollow is placed under them.