<page_title> Leo IV the Khazar </page_title> <section_title> Bibliography </section_title> <table> <cell> Preceded by Constantine V <col_header> Regnal titles </col_header> </cell> <cell> Byzantine Emperor 14 September 775 – 8 September 780 <col_header> Regnal titles </col_header> </cell> </table>
Leo IV the Khazar became emperor on 14 September 775, after Constantine V.