<page_title> List of National Historic Landmarks in Michigan </page_title> <section_title> Current NHLs in Michigan </section_title> <table> <cell> Guardian Building <col_header> Landmark name </col_header> <row_header> 21 </row_header> </cell> <cell> June 29, 1989 (#89001165) <col_header> Date designated </col_header> <row_header> 21 </row_header> </cell> </table>
Guardian Building was designated as a National Historic Landmark on June 29, 1989.