Basil I, called the Macedonian (, Basíleios ō Makedṓn, 811 – 29 August 886), was a Byzantine Emperor who reigned from 867 to 886. Born a lowly peasant in the theme of Macedonia, he rose in the Imperial court. He entered into the service of Theophilitzes, a relative of Emperor Michael III (r. 842–867), and was given a fortune by the wealthy Danielis. He gained the favour of Michael III, whose mistress he married on the emperor's orders, and was proclaimed co-emperor in 866. He ordered the assassination of Michael the next year. Despite his humble origins, he showed great ability in running the affairs of state. He was the founder of the Macedonian dynasty. He was succeeded upon his death by his son (perhaps actually Michael III's son) Leo VI. From peasant to emperor Basil was born to peasant parents in late 811 (or sometime in the 830s in the estimation of some scholars) at Chariopolis in the Byzantine theme of Macedonia (an administrative division corresponding to the area of Adrianople in Thrace). The name of his father was Bardas, the name of his grandfather was Maïktes. His mother was named Pankalo (Παγκαλώ), and her father was called Leo. His ethnic origin is unknown and has been a subject of debate. During Basil's reign, an elaborate genealogy was produced that purported that his ancestors were not mere peasants, as everyone believed, but descendants of the Arsacid (Arshakuni) kings of Armenia, and also of Constantine the Great. The Armenian historians Samuel of Ani and Stephen of Taron record that he hailed from the village of Thil in Taron. In contrast, Persian writers such as Hamza al-Isfahani, or al-Tabari, call both Basil and his mother Saqlabi, an ethnogeographic term that usually denoted the Slavs, but can also be interpreted as a generic term encompassing the inhabitants of the region between Constantinople and Bulgaria. Claims have therefore been made for an Armenian, Slavic, or indeed "Armeno-Slavonic" origin for Basil's father. The name of his mother points to a Greek origin on the maternal side. The general scholarly consensus is that Basil's father was "probably" of Armenian origin, and settled in Byzantine Thrace. It's worth noting that his close associates and friends were mostly Armenians and, besides Greek, he possibly knew how to speak Armenian as well. Norman Tobias, the author of the only dedicated biography of Basil I in English, concluded that