The Belogradchik rebellion broke out in the Belogradchik nahiya, part of the Ottoman Empire, on 6 August 1836, and lasted for 4âÂÂ5 days. It was planned in Knjaà ¾evac (formerly Gurgusovac) in the Principality of Serbia and included participants from Serbia. That year there were also rebellions in nearby Pirot and in Berkovitsa.