<page_title> List of monarchs of Korea </page_title> <section_title> List </section_title> <table> <cell> 21 <col_header> # </col_header> <col_header> Westernized </col_header> </cell> <cell> 455–475 <col_header> Period of reign </col_header> </cell> <cell> Gaero Geun-gaeru <col_header> Posthumous name </col_header> </cell> </table>
Gaero of Baekje (455–475) was the 21st king of Korea.