This Neoclassical granite building, built just west of the Capitol in 1926, boasts interior halls and reading rooms that feature Art Deco motifs and allegorical murals. Serving as a major archive and library of state history, the California Room (library annex building, 900 N St., Room 200; 916-654-8777), behind the main library, also hosts changing exhibits from its special document collections-such as photographs and political posters-on its rotunda mezzanine.