Catalina Pollak Williamson is an artist, architect and urban activist working and researching cross-disciplinary processes that use participation, play and urban performance as methodologies to drive urban and social change. She is particularly interested in the potential of play as a relational process that can contribute to the development of capabilities and civic agency in the production of more empowered and engaged citizens. Since 2012, she has run Public Interventions, a collaborative platform for the production of socially-engaged participatory projects through socio-spatial interventions in contested urban contexts. The work questions new forms of space production and the development of temporary practices of ‘commoning’ to connect and engage communities with their built environment.