Pope Constantine (; 6649 April 715) was the bishop of Rome from 25 March 708 to his death. One of the last popes of the Byzantine Papacy, the defining moment of Constantine's pontificate was his 710/711 visit to Constantinople where he compromised with Justinian II on the Trullan canons of the Quinisext Council. Constantine's was the last papal visit to Constantinople until 1967. Early career Constantine was born in Tyre (modern-day Lebanon). He was fluent in the Greek language and immersed in Eastern rituals and practices. By his upbringing, he would have been "fully at ease in the oriental milieu of the early-eighth-century Byzantine court". With the exception of Antipope Constantine, he was the only pope to bear such a "quintessentially" Eastern name of an emperor. Before his selection as pope, he had visited Constantinople twice. He was one of the papal legates to the Third Council of Constantinople in 680/681. He also delivered a combative letter from Pope Leo II to Emperor Constantine IV in 682. He met and developed a rapport with Constantine IV's son Justinian II on both occasions. Pontificate Constantine's brother and predecessor, Sisinnius, was pope for only twenty days. Constantine became pope in March 708, less than two months later. He was one of the many Greek popes of the Byzantine Papacy, the period during which Rome was under the rule of the Byzantine Empire and popes required the approval of the emperor for consecration as pope. The defining issue of the papacy at the time of Constantine's election was the Western rejection of the Trullan canons of the Quinisext Council. Pope John VII had been sent the canons for approval and instead had sent them back, "without any emendations at all". John VII's predecessor, Sergius I, had declared that he would rather die than subscribe to the council. Visit to Constantinople In 710, Emperor Justinian II demanded in a iussio that Pope Constantine appear before him in Constantinople. The imperial mandate made it "obvious that the relentless emperor meant to settle once and for all the issue of Rome's acceptance of the Trullan decrees". Unlike his predecessors, Constantine neither delayed nor made excuses to avoid appearing in the imperial city; in fact, he "identified with Byzantium as perhaps no Roman pontiff before him ever had". Prior to Constantine's departure, Justinian had blinded Archbishop Felix of Ravenna for plotting to overthrow him, an act that