The building for the Cambridge Medical School of the University of Cambridge was designed in 1899 by Edward Schroeder Prior. Now the Zoological Laboratory, it is a Grade II listed building. The Medical School building is Prior's largest work. Two of Prior's former clients, Dr Allbutt and the Rev. J. B. Lock, were on the committee that appointed the architect. Prior received an honorarium of only 100 guineas for the plans and elevations. He chose to adopt a classical idiom partly as a result of pressure from the committee. The committee also influenced the design in other ways, such as insisting on a stone façade. In style, the building is based on English Baroque, heavily influenced by recent buildings by architects such as Belcher, Pite and Blomfield. It also reflects the presence of J. J. Stevenson's Chemical Laboratories (1886-8), immediately to the west of the site. The Department of Zoology moved in 1933 into the redeveloped building. The architect was John Murray Easton. The former Humphry Museum was entirely reconstructed within, and today houses the Balfour and Newton Libraries. Classical design Although best known for the original buildings of his maturity and for his writings on Gothic art, E. S. Prior produced a number of buildings in the classical tradition. To many architects of the Arts and Crafts Movement, 19th-century classicism had the advantage of continuing a long tradition of craftsmanship. Indeed Prior himself regarded classical styles as "built up on a substratum of craftsmanship which for two hundred years had practiced classic detail in the buildings of ordinary use." Classicism of the 19th century was "the passionate genuine expression of its age." Many of Prior's domestic buildings had classical details, such as the Harrow Billiard Room. He also altered a number of 18th Century buildings, such as Downe Hall and High Grove. In 1895 he designed a cross for Sir Christopher Wren's chapel at Pembroke College and was impressed by "the genius of Wren." Exterior The site is located on the corner of Downing Street and Corn Exchange Street. The building is basically L shaped in plan, with a long arm along Downing Street and the museum wing set at a skew. The Corn Exchange block widens from to . The building was to be built in two phases, and the Corn Exchange block was not constructed until 1934. The Downing Street elevation is three stories high, with three