In England, ornamental rib-vaulting and tracery of "Decorated Gothic" co-existed with, and then gave way to, the "perpendicular" style from the 1320s, with straightened, orthogonal tracery topped with fan-vaulting. "Perpendicular" "Gothic" was unknown in continental Europe and unlike earlier styles had no equivalent in Scotland or Ireland. It first appeared in the cloisters and chapter-house (c. 1332) of Old St Paul's Cathedral in London by William de Ramsey. The chancel of Gloucester Cathedral (c. 133757) and its latter 14th century cloisters are early examples. Four-centred arches were often used, and lierne vaults seen in early buildings were developed into fan vaults, first at the latter 14th century chapter-house of Hereford Cathedral (demolished 1769) and cloisters at Gloucester, and then at Reginald Ely's King's College Chapel, Cambridge (14461461) and the brothers William and Robert Vertue's Henry VII Chapel (c. 150312) at Westminster Abbey. "Perpendicular" is sometimes called "Third Pointed" and was employed over three centuries; the fan-vaulted staircase at Christ Church, Oxford built around 1640.