Cities are where global challenges are tangibly felt and where practical solutions have the most immediate impact on citizens’ lives. As centers of economic opportunity, innovation, and civic participation, cities play a critical role in advancing more sustainable, resilient, and democratic societies. The Aspen Institute (U.S.) and Bloomberg Philanthropies hosted the Bloomberg CityLab 2026 from April 27-29, 2026, in Madrid, Spain, a leading global summit on urban innovation and city leadership.
Now in its twelfth edition, the CityLab 2026 brought together more than 1,000 mayors, policy makers, innovators, artists, and civic leaders, including our Deputy Director Katja Greeson, from around the world, to explore how cities are addressing today’s most urgent challenges. With global cooperation under increasing strain, the summit positioned cities as essential laboratories for practical solutions and international collaboration.
This year’s program highlighted how urban leaders were responding to issues such as the rapid rise of artificial intelligence in public services, housing affordability and supply constraints, climate resilience amid rising temperatures, workforce transitions, and the revitalization of public spaces and civic life. Through interactive sessions, dialogues, and on-the-ground experiences across Madrid, participants examined how local governments are turning innovation into tangible improvements for residents.
Among the speakers were Spain’s Prime Minister Pedro Sánchez, London Mayor Sadiq Khan, former Paris Mayor Anne Hidalgo, Mayor of Kyiv Vitali Klitschko, alongside many other global mayors and civic innovators.
The summit built on more than a decade of CityLab convenings, which has previously been hosted in major global cities including New York, London, Paris, Mexico City, and Amsterdam. The Madrid edition continued that tradition, emphasizing cross-border cooperation and the growing role of cities as drivers of global progress.
The conference was a unique opportunity to connect with international city leaders and innovators, particularly in the context of Aspen Germany’s own urban policy portfolio. Aspen Germany currently leads a project, “Future Cities Go Glocal” supported by the Stiftung Deutsche Klassenlotterie Berlin, which brings together city stakeholders from Berlin, New Delhi, Mexico City, and Nairobi to develop policy recommendations for sustainable and inclusive urban development.
