Mihailo Vojislavljević () was a medieval Serbian king and the ruler of Dioclea (Duklja), from 1046 to 1081 initially as a Byzantine vassal holding the title of protospatharios, then after 1077 as nominally serving Pope Gregory VII, addressed as "King of the Slavs". He had alienated himself from the Byzantines when he supported a Bulgarian Uprising of Georgi Voyteh, after which he then sought to gain support in the West. In 1077 he received a royal insignia by Gregory VII in the aftermath of the Church schism of 1054. Life Early rule With the death of Stefan Vojislav, his dominion was divided among his five sons (according to CPD). Gojislav received Travunia (Trebinje) ruled briefly until he was killed by local nobles, who set up Domanek in his place. Mihailo expelled him and Saganek chosen to rule, but Domanek returned and drove him out. Mihailo offered the office to Radoslav, who declined, afraid of losing Luška župa (future Zeta). Radoslav perhaps distrusted his brother, thinking he would seize Zeta, but Mihailo seems to have offered him a deal. The Byzantine Empire, keen to take advantage of the death of Stefan Vojislav, prepared an offensive against unstable Duklja. At this time, the four remaining brothers made peace and signed an alliance, deemed the oldest treaty in Serbian history. After the agreement, Radoslav attacked Travunia, killing Domanek. After this event, their mother (who had acted as an stability in the relations between the brothers) died. Mihailo succeeded as Knez of "Duklja" in 1046, or as his realm was called by contemporary Cedrenus: "Triballorum ac Serborum principatum". While in no imminent danger from that side, Mihailo found it favorable to further strengthen ties with Byzantium and, in 1050, he received the title of protospatharios and married a niece of Constantine IX Monomachos, something that might have implied a titular recognition of Constantinople's authority, but without no real concessions on his part. It corresponded to the then-current balance of forces and bought some 20 years of peace and prosperity to his land. Aid to anti-Byzantine uprising in theme of Bulgaria Matters started to change after 1071, the year of Byzantium's key Asian debacle at the Battle of Manzikert, as well as of the Norman conquest of southern Italy. In 1072, the Bulgarian noblemen in Skopje planned a revolt against Byzantine rule under the leadership of Georgi Voiteh, the exarchos of the city. The rebel