From cement factory to innovative meeting place: the Bonner Bogen

by Annette Bohlen | Jan, 2025 | architecture, EN, points of interest, Rhine region

I remember well the cement factory, which was vacant in the 1990s (we called it the ‘ghost house’), which we had to go around on the bike path to Königswinter. Today, here – on the sunny side of Bonn – it is a very popular meeting place at the weekend. Cyclists take a break here, families use the lawns and play ground, and pubs and restaurants entice you with food and drink.

The history of the Portland cement factory ended in the 1980s. Then began a long and varied process of planning, tendering and competitions to determine what could be built there.

Rhine promenade with Portland Cement building in view

Finally, an outstanding example of the transformation of an industrial site was created – and is still being expanded – on a beautiful new Rhine promenade. Innovative architecture, sustainable urban planning and an attractive mix of uses blend well with the converted cement factory, a water tower and the former director’s villa.

Planning and conception

Planning for the Bonner Bogen began in the early 2000s and was overseen by renowned architects and urban planners such as Karl-Heinz Schommer. The master plan envisaged a mix of uses, including office space, hotels, restaurants and residential accommodation. A key element was the integration of the site into its natural surroundings, in particular by taking advantage of its proximity to the Rhine and orienting the buildings towards the river. The architectural design emphasised modernity and high-quality materials, while historical elements, such as the heritage-listed water tower, were preserved and integrated into the new buildings.

Particular attention was paid to ecological sustainability. The buildings were constructed according to modern environmental standards, with a focus on energy efficiency and the use of renewable energies.

Implementation and establishment

The construction phase began in 2004 and was realised in several stages. One of the first and most well-known buildings is the Kameha Grand Hotel, which opened in 2009. With its ​architecture​ and special interior design, it has become an emblem of the Bonner Bogen. It attracts not only tourists, but also companies for events and conferences.

Kameha Grand Hotel

Numerous office spaces were built next to the hotel, which are used primarily by companies in the technology, science and consulting sectors. The combination of modern workplaces, high-quality gastronomy and recreational spaces such as the Rhine Cycle Route makes the location a sought-after place for companies and employees.