Extension building on the UN Campus Bonn, high-rise office building in the Bundesviertel, Bonn, Germany
The extension building on the UN Campus Bonn is a modern high-rise with 17 floors above ground and 3 basement levels, featuring glass facades that integrate into the surrounding urban area. The structure houses office spaces for several United Nations agencies located at Stresemannufer.
The foundation stone was laid in October 2016, and construction began in December 2016 under the Federal Office for Building and Regional Planning. The topping-out ceremony followed in June 2019, the 7,000 m² facade was finished in autumn 2020, and the building was handed over to the United Nations on 10 February 2022, with occupancy from April 2022.
The building forms part of the UN Campus in Bonn, strengthening the city's position as a center for international organizations and diplomatic activities.
The building is located at Stresemannufer and is easily accessible by public transportation. Visitors should note that this is a controlled area and advance notification may be required.
Because of its resemblance to the neighbouring Lange Eugen, Bonn residents call the 65-metre tower "Kleiner Eugen". It was briefly Bonn's eighth-tallest building until the Neuer Kanzlerplatz high-rise pushed it to ninth place two years after the 2019 topping-out ceremony.
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