The EUARENAS project explored participatory and deliberative practices in urban settings across Europe, emphasizing how cities serve as hubs for political innovation. As governance cultures evolve, cities have increasingly become key arenas for social inclusion, citizen engagement, and the advocacy of often overlooked social agendas. In this context, EUARENAS examined the role of cities in addressing socio-economic and environmental challenges and their potential as resistors to rising populism and illiberalism. EUARENAS took a practice-oriented approach to political innovation. It investigated how local-level experiments—such as social movements and activism—interact with formal governance structures to promote more inclusive and participatory democratic practices. Through a series of case studies and pilot experiments, the project aimed to bridge the gap between political decision-making and citizens, contributing to stronger participatory and deliberative democracy across the EU and beyond.The project was structured around four interconnected pillars: Case Studies, Piloting, Foresight, and Policy. Case Studies: EUARENAS investigated the mechanisms shaping innovative democratic experiments, analyzing past methods and tools that enhance citizen participation. From an initial pool of 20 cases, 11 governance innovations across various cities and countries were selected for in-depth study. These investigations revealed how experimental governance practices emerge and identified key actors, groups, and strategies involved. Piloting: Pilot initiatives in Võru (EST), Gdańsk (PL), and Reggio Emilia (IT), used insights from foresight research to test and refine participatory governance approaches in real-world settings. Foresight: Analyzed emerging trends and challenges to help identify future pathways for participatory and deliberative democracy, ensuring findings remain relevant in a rapidly evolving political landscape. Policy: The project’s insights were used to inform policy recommendations aimed at strengthening democratic governance. Rather than providing a single, universal solution, EUARENAS found that effective democratic innovation requires a tailored, context-specific approach. While participatory processes share common elements, each setting has unique dynamics, necessitating flexible and adaptive policy frameworks rather than one-size-fits-all solutions. EUARENAS underscored the importance of democratic experimentation and the need for context-sensitive strategies to foster meaningful citizen participation. The project’s findings offer valuable guidance for policymakers, practitioners, and activists seeking to reinforce democratic cultures in urban environments. A major output of the project was the EUARENAS Participatory Governance Toolbox which has a wider appeal that the project itself and the pilot cities involves. It is designed to be a reproducible resource for municipalities, urban planners, community organisations, policymakers, and practitioners involved in participatory governance and urban development across Europe and globally. Additionally, it serves as a valuable resource for NGOs, civic tech enthusiasts, and anyone interested in enhancing citizen engagement and democratic practices. The user-friendly interface of the Toolbox ensures that its future audience can include not only urban professionals or researchers of the topic but also interested lay people or students looking for topics to delve deep into. The intuitive design and accessibility of the Toolbox make it an excellent educational resource for academic purposes and for fostering public understanding of participatory democracy.