The Buzludzha Monument, communist era Bulgaria's architectural pean to its socialist roots. The monument was built at the top of Mount Buzludzha, in the Balkan Mountain range, at the spot where a band of Bulgarian nationalists were defeated by Ottoman forces in 1868 and, in 1891, a secret assembly founded Bulgaria's socialist movement. After a seven year period of construction it was finally unveiled in 1981. 6000 workers toiled to realise architect Gueorguy Stoilov's design that incuded a main hall containing 500 sq metres of mosaic fresco depicting, among others, Marx, Engels, Lenin and the Bulgarian communist leader Todor Zhivkov. In 1989, following the collapse of communist rule in Bulgaria, the monument was left to ruin and since then many of its valuable construction materials have been looted. Today, the derelict building stands as an iconic monument to an abandoned ideology.