Cities are increasingly confronted with challenges such as climate change, resource scarcity and environmental pollution. In recent years, there has been a growing interest in analysing and designing the city as a nutritional space in terms of a circular economy. Topics such as food security, sustainable agriculture and the bio-economy are already integrated in the Sustainable Development Goals (SDGs) of the United Nations. A key objective of various efforts such as the Milan Agreement is to provide urban areas with a sustainable supply of healthy and regional food in order to make them more resilient to crises.