Corpus Christi Church, Aix-la-Chapelle

Built in 1904-1907, St Elisabeth church in Cologne underwent various changes. It served as a parish, exhibition space, urban cultural hotel, and is now repurposed as the "Digital Church" and co-working space since 2017.

Built in 1865, the St. Alfons monastery in Aachen, Germany, transformed into an office building in 2008, while preserving its historical features. The conversion process involved reversible modifications and a glass extension.

The Trinity Church, built between 1897 and 1899, is the largest Protestant church in Aachen. During the Second World War, the church was severely damaged and the building remained empty for several years. In 1948, restoration work was finally undertaken, and the church was put back into use in 1955. Abandoned as a parish church since 2006, it is now used for religious events with young people (Jugendkirche).