How can regions and cities use the four interregional Interreg programmes (ESPON, Interact, Interreg Europe, and URBACT) to address the challenges of the successive crises of the 21st century? From the green transition to employment, from migration to public health, territorial convergence is the EU's holy grail. Our session will offer specific examples of cooperation in the framework of the four programmes that can help local and regional authorities to build resilience and support their economies and their citizens.