Allen, were built between 1963 and 1966 for the College of Chemistry. They joined the existing chemistry buildings Gilman Hall, Lewis Hall, and Giauque Hall. Latimer Hall, an 11-story building, was built between and to the north of Gilman and Lewis Halls in 1963. It is named after Wendell Mitchell Latimer, dean of the College of Chemistry in the 1940s. Pimentel Hall, a round, 2-story lecture hall, was built north of Latimer Hall in 1964 and named after George C. Pimentel, inventor of the chemical laser. Hildebrand Hall was built in between Gilman and Lewis Halls to the south of the complex in 1966. It is named after Joel Henry Hildebrand, a long-time chemistry professor and dean, and houses the California Institute for Quantitative Biosciences and the Chemistry and Chemical Engineering Library. Etcheverry Hall Etcheverry Hall, designed by Skidmore, Owings & Merrill, was built in 1964. It was the first building built by the university on the north side of Hearst Avenue. The building was named after Bernard A. Etcheverry, a professor of irrigation and drainage from 1915 to 1951. Its basement housed the Berkeley Research Reactor from 1966 to 1987, and it now houses the Departments of Mechanical, Nuclear, and Industrial Engineering. Birge Hall Birge Hall, a 9-story building designed by John Carl Warnecke, was completed in 1964 to provide more space for the Department of Physics. It was named for Raymond Thayer Birge, who had been a professor of physics for 45 years (including 22 as department chair) when the new building was named in his honor. Bacon Hall, the university's elegant library and art gallery built in 1881, was demolished to provide space for construction. Davis Hall Davis Hall, designed by Skidmore, Owings & Merrill, was built in 1968 to the west of the Hearst Memorial Mining Building. It was named for Professor Raymond Davis, who spent 50 years on the Berkeley faculty and developed the Engineering Materials Laboratory into one of the world's finest. Davis Hall houses the offices of the Department of Civil and Environmental Engineering, including its structural and earthquake engineering labs and teaching facilities. The building's ground-floor “structures bay” rises two stories, providing space for testing many types of materials and designs, from scale models of California highway overpasses to segments of the Golden Gate Bridge. Evans Hall Evans Hall, a 10-story building designed by Gardner A. Dailey and completed in 1971, is