The Armijska Ratna Komanda D-0 (full civil designation in ; ), also known as the Ark, ARK/D-0, Atomska Ratna Komanda, and nicknamed Tito's bunker, is a Cold War-era nuclear bunker and military command centre located near the town of Konjic in Bosnia and Herzegovina. Built to protect Yugoslav President Josip Broz Tito and up to 350 members of his inner circle in the event of an atomic conflict, the structure is made up of residential areas, conference rooms, offices, strategic planning rooms, and other areas. The bunker remained a state secret until after the breakup of Yugoslavia in the 1990s.
