Sanjak of Bosnia (Turkish: Bosna Sancağı, Serbo-Croatian: Bosanski sandžak / Босански санџак) was one of the sanjaks of the Ottoman Empire established in 1463 when the lands conquered from the Bosnian Kingdom were transformed into a sanjak and Isa-Beg Isaković was appointed its first sanjakbey.After the Bosnia Eyalet was established in 1580 the Bosnian Sanjak became its central province.Although Bosnia Vilayet was officially still part of the Ottoman Empire until 1908 the Bosnian Sanjak de facto ceased to exist in 1878; when it was occupied by Austria-Hungary.[3] Apostolic visitor Peter Masarechi claimed in his 1624 report that the population of Bosnia was 450,000 Muslims, 150,000 Catholics, and 75,000 Orthodox.[4] List of sanjakbeys of Bosnian Sanjak is the following:[citation needed]