popes. In 418, Emperor Honorius settled a controversial election, upholding Pope Boniface I over the challenger Antipope Eulalius. On the request of Boniface I, Honorius ordered that in future cases, any disputed election would be settled by a fresh election. After the demise of the Western Roman Empire, influence passed to the Ostrogothic Kings of Italy and in 533, Pope John II formally recognised the right of the Ostrogothic monarchs to ratify elections. By 537 the Ostrogothic monarchy had been overthrown, and power passed to the Byzantine emperors. A procedure was adopted whereby officials were required to notify the Exarch of Ravenna upon the death of a pope before proceeding with the election. Once the electors arrived at a choice, they were required to send a delegation to Constantinople requesting the emperor's consent, which was necessary before the individual elected could take office. Travel to and from Constantinople caused lengthy delays. When Pope Benedict II (684–685) complained about them, Emperor Constantine IV (in office 654–685) acquiesced, ending the requirement for emperors to confirm elections. Thereafter, the Emperor was only required to be notified. The last pope to notify a Byzantine emperor was Pope Zachary in 741. In the 9th century, the Holy Roman Empire came to exert control over papal elections. While Charlemagne (emperor from 800 to 814) and Louis the Pious (emperor from 813 to 840) did not interfere with the Church, Lothair I (emperor from 817 to 855) claimed that an election could only take place in the presence of imperial ambassadors. In 898 riots forced Pope John IX to recognise the superintendence of the Holy Roman Emperor. At the same time, the Roman nobility also continued to exert great influence, especially during the tenth-century period known as saeculum obscurum (Latin for "the dark age"). In 1059 the same papal bull that restricted suffrage to the cardinals also recognised the authority of the Holy Roman Emperor (at the time Henry IV), but only as a concession made by the pope, declaring that the Holy Roman Emperor had no authority to intervene in elections except where permitted to do so by papal agreements. Pope Gregory VII (in office 1073–1085) was the last pope to submit to the interference of the Holy Roman Emperors. The breach between him and the Holy Roman Empire caused by the Investiture Controversy led to the abolition of the emperor's role. In 1122 the Holy