<page_title> List of Castilian monarchs </page_title> <section_title> House of Trastámara </section_title> <table> <cell> Henry III <col_header> Monarch </col_header> </cell> <cell> 9 October 1390 <col_header> Began </col_header> </cell> </table>
Henry III was the king of Castile in 1390.