Ann Arbor's residential neighborhoods contain architectural styles ranging from classic 19th-century and early-20th-century designs to ranch-style houses. Among these homes are a number of kit houses built in the early 20th century. Contemporary-style houses are farther from the downtown district. Surrounding the University of Michigan campus are houses and apartment complexes occupied primarily by student renters. Tower Plaza, a 26-story condominium building located between the University of Michigan campus and downtown, is the tallest building in Ann Arbor. The 19th-century buildings and streetscape of the Old West Side neighborhood have been preserved virtually intact; in 1972, the district was listed on the National Register of Historic Places, and it is further protected by city ordinances and a nonprofit preservation group. COUNT 4
QSN1 Which century does the Kit houses belong to? ANS1 20th century QSN2 Who primarily occupies the complexes surrounding the University? ANS2 student renters QSN3 Which is the tallest building in Ann Arbor? ANS3 Tower Plaza QSN4 When was the city listed on the National Register of historic Places? ANS4 1972