Over 1,000 ideas were submitted to us as part of a broad public participation process. The ideas were arranged and grouped into overarching concepts. In total, five key concepts were established that would characterize the development of all conversion sites as quality brands. They ensure not only high-quality development, but also consistent alignment with the public’s ideas. Independent projects such as BUGA 2023 or Blue City Mannheim have already been developed using these five concepts.