Naumburg is home to one of the oldest preserved steel reinforced concrete bridges in Germany – the Thainburg pedestrian bridge. The bridge, which is now under a preservation order, was built in 1892 and made of steel reinforced concrete, a new material at that time. In recent decades, the structure has suffered corrosion damage due to lack of maintenance and constructional sealing defects. For reasons of material efficiency and design, a strenghtening with carbon reinforced concrete was chosen. The strenghtening works were carried out in summer 2021. The finishing renovational works was carried out in autumn 2021.