Karl-Marx-Hof (English: Karl Marx Court) is one of the best-known Gemeindebauten (English: municipal housing complexes) in Vienna, situated in Heiligenstadt, a neighbourhood of the 19th district of Vienna, Döbling.
At over a kilometre in length (1,100 metres (0.68 mi)) and spanning four Straßenbahn (tram) stops, Karl-Marx-Hof is one of the longest single residential buildings in the world.
(c) Wikipedia
