Stadttor, Office building in Düsseldorf, Germany.
The Stadttor is a 75-metre, 20-storey office tower in Düsseldorf's Unterbilk district, designed by Petzinka, Overdiek und Partner and completed in 1998. Its parallelogram-shaped floor plan follows the geometry of the surrounding buildings and the Rheinufertunnel beneath it. A central hall about 56 metres high, flanked by offices on two sides and in the attic storey, gives the building the character of a gatehouse.
The building was completed in 1998 and served as the seat of North Rhine-Westphalia's State Chancellery from 1999 to 2017. This period established it as a key governmental hub for state administration.
The building occupies a central place in Düsseldorf's government quarter, where parliament and ministries cluster together. It shapes the appearance of a location where political decisions are made for the state.
The Stadttor stands at Stadttor 1 in Unterbilk, where Bundesstraße 1 enters the Rheinufertunnel. The lobby level on the fourth floor holds shops and a food outlet. The building is an office tower with rented premises, so interior access is generally limited to tenants and their visitors.
The building stands on the Rheinufertunnel and uses it as its foundation, so the motorway passes directly beneath the offices. Its parallelogram floor plan was derived from the surrounding buildings and the tunnel's course. Between the inner beech-and-glass facade and the outer steel-and-glass skin lies a 1.40-metre-wide climatic buffer with walkable balconies and sunshades.
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