The VAULTING becomes much more complicated and enriched in this Period. Diverging ribs having bosses and shields at their points of intersection, cover the surface of the Vault: the plans of these vaultings are very various: some are called _Fan-tracery_ vaults, and others _Stellar_ vaults, terms which explain themselves. Open wooden roofs of elaborate construction, and large span, become common in this Period. They spring frequently from Corbel shafts, resting on figures in the Clere-story wall; and have rich cornices of mouldings and carved work, traceried spandrels, figures of angels, and richly moulded beams. The AISLE-ARCADE is not often found, but its place is sometimes supplied by the rectangular surface panelling, so characteristic of the Period, which in some of the richer buildings literally covers the whole of the walls, leaving no blank or unoccupied space. PRINCIPAL BUILDINGS OF THE RECTILINEAR PERIOD. YORK Cathedral Church Choir. WINCHESTER Cathedral Church Nave. CANTERBURY Cathedral Church Transepts. CANTERBURY Cathedral Church Nave. YORK Cathedral Church West Towers. WELLS Cathedral Church Central Tower. BEVERLEY Minster West Front. BRIDLINGTON Priory Church West Front. HOWDEN Collegiate Church Chapter House. CAMBRIDGE St. Mary's Church Nave. LONG MELFORD Holy Trinity Church Chancel, Nave. SAFFRON WALDEN St. Mary's Church Chancel, Nave. LAVENHAM St. Peter and St. Paul's Church Nave. DONCASTER St. George's Church Chancel, Nave. BURY ST. EDMUND'S St. James' Church Chancel, Nave. ROTHERHAM All Saints' Church Nave, Transepts. HULL Holy Trinity Church Nave. WINDSOR St. George's Chapel Chancel, Nave. MANCHESTER Cathedral Church Choir, Nave. TAUNTON St. Mary's Church Nave, Tower. GLOUCESTER Cathedral Church Choir. CAMBRIDGE King's College Chapel. WARWICK St. Mary's Church Beauchamp Chapel. WESTMINSTER Cathedral Church Henry Seventh's Chapel. BATH Abbey Church Choir, Transepts, Nave. THE SEVEN PERIODS OF ENGLISH ARCHITECTURE. ROMANESQUE. A.D. A.D. YEARS. I. SAXON PERIOD from ---- to 1066, prevailed -- II. NORMAN PERIOD " 1066 " 1145, " 79 III. TRANSITIONAL PERIOD " 1145 " 1190, " 45 GOTHIC. IV. LANCET PERIOD " 1190 " 1245, " 55 V. GEOMETRICAL PERIOD " 1245 " 1315, " 70 VI. CURVILINEAR PERIOD " 1315 " 1360, " 45