<page_title> Constantine IV </page_title> <section_title> External links </section_title> <table> <cell> Byzantine Emperor 15 September 668 – 14 September 685 with Constans II, 654–668 Heraclius and Tiberius, 659–681 <col_header> Regnal titles </col_header> </cell> </table>
Constantine IV was Emperor in 668.