"Gemeindebauten" have become an important part of the architecture and culture of Vienna since the 1920s. Up to 1918, the housing conditions of Vienna's growing working class were appalling by modern standards. City investigators routinely discovered unsanitary living conditions during inspections, with issues of overcrowding, excessive moisture, and a complete lack of light and air being among the most frequently cited problems. By 1877, the municipal health authority of the city (the "Stadtfysikat") reported 1,113 instances of unfit dwellings, over two-thirds of which were cited for excess moisture. Overcrowding was also a perennial issue, and one case documented in the municipal health report of 1871 found that