The windows in the first quadrangle, he noted, were Elizabethan in style, with mullioned windows and arched lights, arranged symmetrically, whereas the hall windows were Gothic in style. The historian John Julius Norwich wrote that the first quadrangle had "a curious charm, due partly to its size and partly due to its several small eccentricities", including the curved path crossing the quadrangle from the entrance to the hall. The architect and designer Sir Hugh Casson, though, thought that the "crooked off-axis line" of the path was the college's oddest feature. All four sides of the first quadrangle are Grade I listed buildings (the highest grade, for buildings of exceptional importance and international interest): the lodgings and chapel on the north side, the hall on the west side, and the buildings on the east and south sides. Construction of the chapel began when Griffith Powell was Principal (1613–1620). It was finished under Sir Eubule Thelwall (who took office in 1621), with the Bishop of Oxford leading the dedication ceremony on 28 May 1621. Thelwall's portrait, displayed in the hall, shows him holding a roll inscribed "A plan of the Chappell in Jesus Coll., Oxford built by Sir Eubule Thelwall", reflecting the fact that he was the main donor towards the chapel's construction. There are four windows facing the quadrangle in the Perpendicular style. Seats were added in 1633, and it was extended in two directions in 1636. The east end was moved to reach Turl Street, a new east window was added and the previous window was converted into an arch; at the other end, the entrance was moved further to the west. Sir Charles Williams of Monmouthshire, south Wales, paid £200 towards the final bill of £211. The architectural historian Giles Worsley has described the chapel's east window as an instance of Gothic Revival architecture, rather than Gothic Survival, since a choice was made to use an outdated style – classical architecture had become accepted as "the only style in which it was respectable to build". The window has seven main sections ("lights") topped with five-headed flower shapes, or cinquefoils, and tracery running vertically. The chapel is one of various buildings at the universities of Oxford and Cambridge from the first half of the 17th century where Gothic designs were deliberately chosen in preference to Classical; other examples are the chapel of Lincoln College, Oxford, the chapel windows and hall roof at Wadham College, Oxford, and the library of St John's College, Cambridge, where the library of 1624 was built with Gothic windows since "some men of judgement" preferred the old fashion as it was "most meet for such a building".