Bulgaria urged to save communist-era architectural 'masterpiece' Perched like a vast flying saucer on a central Bulgarian mountainside, Buzludzha is a brutalist concrete monument that was built to glorify communism nearly 40 years ago. The striking circular building has been left to fall victim to vandalism and decay, as Bulgaria has been eager to forget its communist past, but now western experts want to preserve it as a heritage site. IMAGES AND SOUNDBITES