The “Re-Use Network Hessen” organised the first Hessian Re-Use Symposium on 7 September 2022 in Frankfurt am Main together with the Hessian Ministry for the Environment, Climate Protection, Agriculture and Consumer Protection and the Environmental Office of the City of Frankfurt. With the Hessian Re-Use Network, the actors in the municipalities will have a central contact point in Hessen, an information service and the opportunity to explore synergy effects through networking. The BMBF-funded research project “Innovative Re-use of Building Materials – WieBauin” was kindly allowed to present its research results and current activities in a lecture given by Prof. Dr.-Ing. Hans-Joachim Linke. New and interesting approaches for future cooperation emerged from the contacts made in the ensuing discussion.