Karl Marx-Hof is located in the neighborhood of Heiligenstadt, in Vienna and is the world’s longest residential building. Karl Ehn built the colossal building between 1927and 1930. The 1,100 meters long construction had to be merged with four tram stops and several tunnels in order to allow the continuation of the city streets and the traffic flow.
The building was one of the 400 new municipal apartment complexes called Gemeindebauten, which were built for the homeless families after the First World War.
Karl Marx-Hof includes 1,382 apartments, kindergartens, playgrounds, maternity clinics, health-care offices, libraries, laundries, youth centers, a post office, a pharmacy and 25 other shops.
Today, the building houses the city’s residents, but it’s not the most sought after place due to their small size and lack of modern conveniences, most of the tenants being mostly young couples starting families.