Salt Lake City Public Library

The Old Hansen Planetarium at 15 South State Street in Salt Lake City, Utah has served many functions throughout its history. Originally built in 1904 as the Salt Lake City Public Library, the building was renovated in 1965 to become the Hansen Planetarium. After the planetarium closed and was replaced by the Clark Planetarium in 2003, the building was remodeled into the O.C. Tanner Company Headquarters, which opened in 2009. The building was listed on the National Register of Historic Places in 1979.