Westminster Abbey is located in Westminster, London. Built on the site of ealier Saxon and Norman monastries, the present building is largely Early English, rebuilding being commenced by Henry III in 1245. The work was carried out under the masons Henry of Reynes, John of Gloucester and Robert of Beverley. Work continued over the following centuries with the rebuilding of the remaining bays of the nave commenced by Henry Yevely from 1375. This work was stylistically consistent with the earlier rebuilding. In contrast the Henry VII Chapel with its tour-de-force fan vaulting, the culmination of the increasing complexity found in English vaulting technique, was built from 1503. The west towers were completed by Nicholas Hawksmoor from 1735-40. The interior is dominated by the monuments to the kings and queens of England buried there and those of the so-called Poets' Corner. Ruskin describes Westminster Abbey as 'more didactic to the English nation than a million of popular illustrated treatises on architecture' ( Works, 22.327), although in The Seven Lamps of Architecture (1849) he claims that the Tudor carving 'of Henry the Seventh's Chapel simply deforms the stones of it', a view reiterated in 1880 ( Works, 8.146).