Obverse legend : D N CONSTAN-TINYS E CONST.
Obverse description : Buste couronné, coiffé du casque à plumet, cuirassé, de face, tenant une haste de la main droite reposant sue l’épaule droite et un bouclier.
Obverse translation : (Dominus Noster Constantinus et Constans).
Reverse legend : DEYS ADIUTA ROMANIS.
Reverse description : Croix potencée posée sur un globe et deux degrés, accosté à gauche d’Héraclius et de Tibère à droite, tous les deux couronnés, vêtus de la chlamyde, tenant chacun un globe crucigère ; Tibère est plus petit que son frère.
Reverse translation : (Dieu aide les Romains).
CONSTANTINE IV, and Tiberius HERACLIUS
Associated to the throne from 659 by their father Constans II, Heraclius and Tiberius were deposited by their brother, Constantine IV, who succeeded his father in 668 after the assassination of the latter. He immediately had to face the Islamic thrust. Constantinople was threatened and besieged for four years. For the first time in siege warfare, the Greek fire was used to repel the attackers. Islamic fleet wiped heavy losses and the city was saved. Constantine IV also had to fight against the Bulgarian interference in the Balkans, where the Byzantines were finally beaten and forced to abandon their Moesia winners. He reigned only the last four years of his life and left the empire in 685 Justinian II.