Basil II

Basil II Porphyrogenitus, nicknamed the Bulgar Slayer, was the senior Byzantine Emperor for almost 50 years, having been a junior colleague to other emperors since 960. He and his brother Constantine were named as co-rulers before their father Romanos II died in 963. The throne went to two generals, Nikephoros Phokas then John Tzimiskes, before Basil became senior emperor. His influential great-uncle Basil Lekapenos was the de facto ruler of the Byzantine Empire until 985. Basil II then held power for forty years.