From 1900 to 1920 many new buildings were built on campus , including buildings for the dental and pharmacy programs , a chemistry building , a building for the natural sciences , Hill Auditorium , large hospital and library buildings , and two residence halls . From 1900 to 1920 the university constructed many new facilities , including buildings for the dental and pharmacy programs , chemistry , natural sciences , Hill Auditorium , large hospital and library complexes , and two residence halls .