The CLERE-STORY in nearly all large buildings carries a gallery made in the thickness of the wall, which passes between the Clere-story Window and the inner face of the _Main Wall_. This inner face is accordingly carried on one or more arches. In Norman buildings, this Clere-story arcade usually consists of three arches, of which the middle one is the largest, and corresponds with the window. In some examples, this middle arch is stilted above the others, by being lifted on a second small shaft on each side, standing on the lower one which carries the side arches. In almost all buildings of importance, an ARCADE is carried along the walls of the Church below the side-aisle windows. In Norman buildings this usually consists of a series of single or intersecting circular arches, resting on small cushion capitals on single shafts. The side-aisles are usually covered with a plain circular quadripartite VAULT, having sometimes a diagonal rib, as well as a transverse band, moulded with single roll mouldings. PRINCIPAL BUILDINGS OF THE NORMAN PERIOD. TOWER OF LONDON White Chapel. ST. ALBANS Abbey Church Transepts, Nave. ROCHESTER Cathedral Church Nave. WINCHESTER Cathedral Church Transepts. HEREFORD Cathedral Church Nave. ELY Cathedral Church Transepts. LINCOLN Cathedral Church West End. CARLISLE Cathedral Church Nave. SELBY Abbey Church Transepts, Nave. GLOUCESTER Cathedral Church Nave. CHICHESTER Cathedral Church Nave. WALTHAM Abbey Church Choir. SOUTHWELL Abbey Church Transepts, Nave. DURHAM Cathedral Church Choir. CHRISTCHURCH Priory Church Transepts, Nave. NORWICH Cathedral Church Choir. TEWKESBURY Abbey Church Nave. DURHAM Cathedral Church Nave. LINDISFARNE Abbey Church Transepts, Nave. ROMSEY Abbey Church Choir, Transepts. WINCHESTER Cathedral Church Tower, Transepts. ELY Cathedral Church Nave. PETERBOROUGH Cathedral Church Choir. NORWICH Cathedral Church Nave. CASTLE ACRE Priory Church Nave. CHAPTER VI. TRANSITIONAL PERIOD. PRINCIPAL CHARACTERISTIC. THE CONTEMPORANEOUS USE, IN THE SAME BUILDING, OF CIRCULAR AND POINTED ARCHES. _Exterior Compartment._ On the outside the usual prevalence of the circular arch in the WINDOWS and DOORWAYS, gives still a Norman character to the building; but the BASE-COURSE and BUTTRESSES begin to show greater projection, and the walls are lightened in proportion. The invariable Billet moulding disappears from the STRING-COURSES. The WINDOWS are more elongated in form, and have lighter shafts. The circular CORBEL-TABLE gives place to a regularly moulded CORNICE, carried on a series of blocks of uniform profile; and a sloped COPING covers the PARAPET.