The document discusses a cluster of 21 connected and sustainable cities in Europe and the Mediterranean region. The goals are to create experiences and initiatives for sustainable, connected 21st century cities. This includes developing new locally innovative and carbon-effective ecosystems, places for networking, and free sustainable mobility. The strategy combines ICT and sustainable development to address major societal and environmental challenges of 21st century cities. A partnership includes public and private institutions, cities, companies, experts, researchers, and NGOs working collaboratively without competition.