between the brothers) died. While in no imminent danger from that side, Mihailo found it favorable to further strengthen ties with Byzantium around 1052, gaining the title of protospatharios, also marrying a niece of Constantine IX Monomachos. This might have implied titular recognition of Constantinople's authority, but 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. Late Middle Ages Under the name of Tribunia or Travunja (the Trebigne of the Ragusans), it belonged to the Serbian Empire until 1355. Trebinje became a part of the expanded Medieval Bosnian state under Tvrtko I in 1373. There is a medieval tower in Gornje Police whose construction is often attributed to Vuk Branković. The old Tvrdoš Monastery dates back to the 15th century. The Area of Trebinje, has produced the House of Mrnjavčević and was at times ruled by members of the Serbian royal family, like Queen Hellen of Anjou in the 13th century. Travunia got a neighbour by 1326, as the Bosnians conquered Zachlumia. In 1345, the Serbian Empire was created. After the collapse of the Serbian Empire in 1371, the area of Trebinje became ruled by the House of Vojinović Serbian dynasty from Hum. With Nikola Altomanović's defeat, the Bosnian King Tvrtko took the area in 1377 and it has been a component of Herzegovina ever since. List of Rulers This lists only the rulers who had Travunia as their appanage or fief and will not house the rulers of the region of Travunia. Travunia was merged into neighbouring states and lost its importance several times in history (amalgamation). Beloje (before 839), župan of Travunija Krajina Belojević (fl. 847/848), župan of Travunija, son of Beloje and son-in-law of Vlastimir Hvalimir (late 9th century), župan of Travunija, son of Krajina Čučimir (first half of 10th century), župan of Travunija, son of Hvalimir Dragimir (before 1000–1018), Prince of Travunija and Zachlumia Domanek (fl. 1054), Prince of Travunija Desa (1149–1162), Prince of Duklja, Travunija and Zahumlje Grdeša (fl. 1150–51), župan of Travunija See also Kanalites Pagania Zachumlia Duklja References Sources Primary sources Secondary sources Ćorović, Vladimir, Istorija srpskog naroda'', Book I, (In Serbian) Electric Book, Rastko The early history of the Slavonic settlements in Dalmatia, Croatia, & Serbia (1920) Historical regions Medieval Bosnian state Medieval Serbia History of Dalmatia Former countries in the Balkans Former Slavic countries