which now houses an art gallery. Clarks Wood Company warehouse, the St Vincent's Works in Silverthorne Lane, and the Wool Hall in St Thomas Street, are other survivors from the 19th century. The local Pennant sandstone is frequently used as walling material, often with limestone dressings, as found on the old Temple Meads railway station and Clifton Down railway station. Pennant sandstone is also used as large rock-faced squared blocks, described as Pennant rubble, which are used alone, eked out with plain brickwork, or incorporated into the more rugged examples of Bristol Byzantine. Much of the local transport infrastructure including the Clifton Suspension Bridge and the original Temple Meads railway station—now used as the British Empire and Commonwealth Museum—were designed or built by Isambard Kingdom Brunel. In 1864, after over 100 years of planning, the Clifton Suspension Bridge over the Avon Gorge linked the city to the Ashton Court estate. However, development to the west of the River Avon remained limited. Edward Everard's printing works with its detailed ceramic frontage was constructed in 1900. 20th century In the early part of the 20th century further expansion took place in residential districts increasingly distant from the city centre. Bristol Hippodrome was designed by Frank Matcham, and opened on 16 December 1912. The Wills Memorial Building was commissioned in 1912 by George Alfred Wills and Henry Herbert Wills, the magnates of the Bristol tobacco company W. D. & H. O. Wills, in honour of their father, Henry Overton Wills III, benefactor and first Chancellor of the University of Bristol. Sir George Oatley was chosen as architect and told to "build to last". He produced a design in the Perpendicular Gothic style, to evoke the famous university buildings of Oxford and Cambridge. The university also took over several existing houses such as Royal Fort, Victoria Rooms, Clifton Hill House, Goldney Hall, Wills Hall and buildings on Berkeley Square, Park Street and the surrounding areas. Oatley was also involved in the design or restoration of other buildings in Bristol in the early part of the 20th century, including the restoration of John Wesley's original Methodist chapel, the New Room. The 1930s saw the construction of the Employment Exchange and the planning of the new Council House, although this was not completed until 1956. As a centre of aircraft manufacturing, Bristol was a target for bombing during the Bristol Blitz of World War II. Bristol's