Basil I, known as "the Macedonian," was born in the year eight hundred eleven to a peasant family in the theme of Macedonia. His rise to prominence began when he caught the attention of Emperor Michael III, leading to his marriage to the emperor's mistress at Michael's behest. This pivotal moment set the stage for his eventual ascent to power.
In the year eight hundred sixty-six, Basil was proclaimed co-emperor by Michael III. However, driven by a desire to secure his influence, he orchestrated the assassination of Michael the following year, positioning himself as the sole ruler of the Byzantine Empire. This marked the beginning of the Macedonian dynasty, with Basil as its inaugural leader.
Despite his humble beginnings, Basil I proved to be an effective and respected monarch. He initiated a comprehensive overhaul of Byzantine law, a significant reform that would be further developed by his successor, ultimately resulting in the creation of the Basilika. His reign also saw military successes, notably against the heretical Paulicians, whom he subdued in the year eight hundred seventy-two.
On the foreign front, Basil pursued an active policy in the west, forming an alliance with Carolingian emperor Louis II against the Arabs. This strategic partnership ushered in a new era of Byzantine dominance in Italy. Tragically, Basil's life came to an untimely end in a hunting accident in the year eight hundred eighty-six, after which he was succeeded by his son Leo VI, who was also rumored to be the son of Michael III.