companions (such as noted by the court historian, Callisthenes); he later did not insist on the practice. Most of his men could cope with Alexander's interest for having a Persian wardrobe, but honoring the king as if he was a god with proskynesis went a bit too far. According to Arrian, Callisthenes explains the existence of separated ways of honoring a god or a human and that prostration is a way to explicitly honor gods. It is seen as a threat to the Greeks, ‘who are men most devoted to freedom’. According to Callisthenes, prostration was a foreign and degrading fashion. The emperor Diocletian (AD 284–305) is usually thought to have introduced the practice to the Roman Empire, forming a break with the Republican institutions of the principate, which preserved the form, if not the intent, of republican government. However, there is some evidence that an informal form of proskynesis was already practiced at the court of Septimius Severus. The political reason for this change was to elevate the role of the emperor from "first citizen" to an otherworldly ruler, remote from his subjects, thus reducing the likelihood of successful revolt, which had plagued the Empire during the preceding 50 years. Certain forms of proskynesis, such as those which entailed kissing the emperor's breast, hands, or feet, were reserved to specific categories of officials. The audience granted to native or foreign delegations included multiple series of proskynesis at points marked by porphyry disks (omphalia) set in the floor. Until the 10th century at least, imperial ceremonial avoided proskynesis on Sundays out of reverence for the God. As a show of loyalty, proskynesis had strong political overtones; it recurs in imperial iconography and its importance in imperial ceremonial could sometimes raise delicate diplomatic dilemmas when foreign potentates were involved. Similarly, the emperor was hailed no longer as "Imp(erator)" on coins, which meant "commander in chief" but as "D(ominus) N(oster)" - "Our Lord." With the conversion of Constantine, I to Christianity, proskynesis became part of an elaborate ritual, whereby the emperor became God's viceregent on earth. Titular inflation also affected the other principal offices of the Empire. Justinian I and Theodora both insisted on an extreme form of proskynesis, even from members of the Roman Senate, and they were attacked for it by Procopius in his Secret History. In Christianity The verb προσκυνέω (proskyneo) is often used in the Septuagint and New