I. The Norman style commenced in the reign of Edward the Confessor, whose work at Westminster (the sub-structure of the dormitory and the lower part of the walls of the refectory with the ornamental arcade) is declared to be the earliest example of the Norman style in England. This style prevailed to the time of Henry II., when a period of transition set in, and the style began to approximate to that of the succeeding century. The main characteristics of the Norman style are--cylindrical massive piers, round-headed arches, a great variety of mouldings such as zigzag, billet, double-cone, pellet, lozenge, beak-head, etc., small and narrow windows splayed only on the inside, buttresses slightly projecting from the wall. Some of the best examples of this style are the naves of Ely, Gloucester, Durham, and much Norman work is seen at Winchester, Exeter, Canterbury, Chester, Peterborough, Norwich, Rochester, Chichester, Oxford, Worcester, Wells and Hereford. II. The Early English style began with the thirteenth century, in the reign of King John, the choir of Lincoln being the earliest example. Wearied with the Romanesque uncouth details of Norman art, the English masons were feeling after and finding a more excellent way, and discovered the beauties of Gothic architecture. This style flourished until the time of Edward I.; during his reign another period of transition set in, and this style gradually developed into the Decorated. Its main characteristics are lighter and more elegant forms of construction and decoration, pointed arches, often shaped like a surgeon's lancet, whence they derive their name, deeply undercut mouldings, dog-tooth ornament, piers formed of columns with detached shafts united under one capital, and bound together by a band, bell-shaped capitals, stiff-leaved foliage, trefoiled arches, plate-tracery. Early English work is seen in the choir of Lincoln, Worcester, Chichester, Salisbury, Exeter, Wells, Rochester, York (south transept), Southwell, Ripon, Ely, Peterborough, Durham ("nine altars"), Glasgow.