Contributor(s): Assembly SE8 , Atelier d'architecture autogérée , Public Works Group | With an evening of provocations and discussion, Theatrum Mundi launched Designing the Urban Commons, an ideas competition calling for new ways to stimulate the city’s public and collective life. Three groups engaged in live projects in London and Paris presented their work, describing how commoning emerges through the spaces they have created or occupied and also examining the issues and opportunities presented by commons as an approach to urban design. The competition brief, which also went live on 25th March, asked for existing land, architecture, or infrastructures in neighbourhoods across London to be re-imagined as common spaces, or for new urban commons to be carved out in the city or online. Commons are not static pieces of architecture. We are seeking designs through which the social act of commoning could take shape, by enabling citizens to co-produce urban resources from culture & knowledge to housing, energy or democratic processes.