For decades, Jordi Colomer has explored the city as a space that is both real and fictional. His practice involves sculpture, installation, video, and public interventions, with a marked performative sense that employs actions to test habitual uses of architecture and urban space. Colomer is interested in the system of representations of the city and our ability to subvert them by using imagination, humour, community, fiction, and utopia. Invited by the festival as part of The School of Fireflies, Colomer leads a working group focused on the transformation of the Bourse area over the past decade. What aspects of a city’s immaterial life vanish as its physical landscape changes? Inspired by participatory architecture—design shaped by those who use it—such as the work of Belgian architects Lucien and Simone Kroll, a group of artists and citizens will explore the city as an ‘expanded theatre’. They will focus on the potential for creating new collaborative traditions in public space—alternatives to the commercial logic and homogenisation that dominate city centres today. Open to all citizens interested in transforming public space, this five-day class blends reflection and intervention to challenge contemporary urban narratives and foster the creation of future traditions.