The university runs twelve different residence halls: seven undergraduate residence halls or complexes, both with and without themes; family student housing; re-entry student housing; and optional international student housing at the International House, built with a gift from John D. Rockefeller, Jr. and the erstwhile home of six Nobel laureates. Undergraduate residence halls are located off-campus in the city of Berkeley. Units 1, 2 and 3, located on the south side of campus, offer high-rise accommodations with common areas on every other floor. Units 1 and 2 share a common dining hall, Crossroads. The oldest unit, Unit 3, has its own dining hall, Café 3, on the first floor. At the beginning of the 2018–2019 school year, a new building called Blackwell Hall, was opened across the street from Unit 3. These buildings share a dining hall. Further away and also on the south side of campus is Clark Kerr, an undergraduate residential complex that houses many student athletes and was once a school for the deaf and blind.