The properties in the development include a total of 573 apartments, a kindergarten, various neighborhood facilities and ground floor commercial spaces.

It is located in the Hard quarter on Bullingerstrasse or Norastrasse of District 4, situated in the western part of Zürich.

[6] All the four towers display a square floor plan were built by the architect Max P. Kollbrunner between 1976 and 1978 as part of the first Swiss high-rise boom.

[7] The enthusiasm for high-rise buildings gradually waned in the following years; the development became slums because it was not attractive enough for families with children.

[8] In 1984, an initiative adopted by the people put a political end to the construction of high-rise buildings in Zurich's inner city.