The Roman Catholic Diocese of Banja Luka (Serbo-Croatian: Banjalučka biskupija, Latin: Dioecesis Bania Lucensisis) is a diocese of the Latin Church of the Roman Catholic Church in western Bosnia. The diocese is centred in the city of Banja Luka, Bosnia and Herzegovina. Erected on July 5, 1881, the diocese is a suffragan of the Archdiocese of Vrhbosna, as the Diocese of Banjaluka. In 1985, the name of the diocese was split to the current diocese of Banja Luka. Bishop Franjo Komarica is head of the diocese. The original Cathedral of Saint Bonaventure in the city was built in 1887. However, an earthquake in 1969 levelled the church. Banja Luka's current cathedral was built in 1974. The city of Banja Luka, and much of the territory that the diocese covers contains an Orthodox Christian majority. The Bosnian War greatly affected the diocese. Virtually all of the churches in the bishopric sustained some damage, and many were destroyed. Many Catholics were expelled from the region or fled, leaving only a fraction remaining. Bishop Komarica has been urging people to return, to mixed results. History Christianity arrived on the territory of present-day diocese of Banja Luka during the Roman rule in the first century AD. Christians and bishops from the area settled around two metropolitan seats, Salona and Sirmium. In this area there was at that time the seat of at least one diocese, Diocese of Baloie (probably near Šipovo), whose bishop participated in the church synod of Salona in 530. After the barbaric invasion and after the settlement of Slavic tribes, these regions belonged to the surrounding dioceses: Split, Nin, Knin, Krbava and Bosnia, and the area of today's Banja Luka and the entire northern region was part of the Diocese of Zagreb. A rich life of the Catholic Church in this region before falling under Ottoman rule is testified by numerous churches from ancient and medieval times discovered on the territory of the Diocese. The highest concentration was in the Bihać Deanery area. The Ottoman conquest that brought the demolition of Catholic churches and the islamization of the population, almost completely destroyed the presence of the Catholic Church in these areas, with the exception of southern regions around Livno. City of Bihać resisted the longest, until 1591. From the time of the Ottoman conquest, the pastoral clergy in these parts were almost exclusively Bosnian Franciscans. On the Livno area was recorded