Throughout Bosnia, mosques were systematically destroyed by Serb and Croat armed forces in the Bosnian War during the 90s. Many buildings were damaged or destroyed, with up to 80% of well-over 4000 different pre-war Islamic buildings.[7] Among the most important losses were two mosques in Banja Luka, Arnaudija and Ferhadija mosque, which were on the UNESCO register of world cultural monuments. Today they are, along with many other, protected heritage of Bosnia and Herzegovina.