in addition to careful handling of the building's fabric, also stipulated retention of the original facade. As part of the facade renovation, around 500 horizontally pivoted windows with Forster steel profile [...] pivoted windows were used here, which form continuous rows and are a defining feature of the facade's orthogonal, grid-like pattern. Over the years, however, these were replaced by tilt--turn windows, which [...] the building was in good condition. Three preserved box windows were also found, which were ahead of their time. The horizontally pivoted windows ensure good air circulation in rooms via the upper and lower