Arnaudija Mosque (; ) built in 1594, is a large mosque in Banja Luka, Bosnia and Herzegovina before it was destroyed by the Army of Republika Srpska on 7 May 1993. Arnaudija is designated National Monument, by the Commission to Preserve National Monuments of Bosnia and Herzegovina.
The mosque was demolished by explosives on May 7, 1993, by the Serb militia. The demolition was organized by the authorities of the Republika Srpska which included the demolition of the entire Arnaudija mosque complex and Ferhadija mosque complex that were approximately distant from each other. Both mosques were destroyed in the same night just within the time frame of 15 minutes.
One of the Serbs leaders from Banja Luka, Radoslav Brđanin was convicted for his part in organizing the ethnic cleansing of the non-Serbs and destruction of the properties of Muslims, including mosques. Radoslav Brđanin was sentenced to a single sentence of 32 years of imprisonment. The reconstruction of Arnaudija mosque started in April 2017 and is expected to finish in 2022.