231 S. LaSalle (The Central Standard Building)

The Central Standard Building, formerly the Continental Illinois Bank Building, stands across LaSalle Street from the Federal Reserve Bank of Chicago, two neoclassical near-twins guarding the main intersection of Chicago's financial district. Its namesake bank called the building home until a financial collapse in 1984. Interior spaces include a mix of neolassical and Gothic Revival architecture with Art Deco influences, most notably a massive 88,000-square-foot grand banking hall on the second floor, recently restored. The building stands on the site of the former Grand Pacific Hotel, where the continental United States was officially divided into four standard time zones in 1883, an event commemorated with a plaque outside the building on Jackson Street.

Graham, Anderson, Probst & White, 1924