<page_title> List of tallest buildings in Chicago </page_title> <section_title> Tallest buildings </section_title> <table> <cell> Richard J. Daley Center <col_header> Name </col_header> </cell> <cell> Tallest flat-roofed building in the world that contains fewer than 40 floors. Was the tallest building in Chicago before being surpassed by the John Hancock Center. <col_header> Notes </col_header> </cell> </table>
The Richard J. Daley Center was the tallest building in Chicago until the John Hancock Center was completed.