Many scholars and practitioners consider culture an essential ingredient of sustainability that is often underrepresented in the mainstream discourse on sustainability. However, in the last decade, the idea of culture as an agent of transformation capable of driving urban sustainability has gained momentum. New movements for urban sustainability tend to focus on the socio-spatial benefits and try to improve and activate the public realm by fostering socially innovative cultural practices as strategies for urban regeneration to create open, accessible, engaging public spaces for collective uses and cultural production. In many European cities, local authorities, civil representatives and citizens are experimenting with cultural production in the public sphere, driven by co-creation and governed collaboratively. As the public, private, and citizen spheres become more interlinked, the governments and urban and cultural actors are mobilising large networks to support organisations, collectives, grassroots movements, innovation labs, cultural innovators, and community representatives of marginalised groups to co-create and co-govern the city. This thesis investigates the different mobilisations of socially innovative governance arrangements for cultural practices that enhance urban sustainability and how these governance arrangements are being organised. To this aim, cultural governance forms the theoretical underpinning and several cultural practices in Berlin are analysed. Analysis of documents and semi-structured interviews were conducted, providing comprehensive results.  Findings revealed the various interactions between actors and sectors, the motivation and context behind the practices, and the kind of sustainable cultural practice they want to pursue. A dynamic range of mobilisations can be found within Berlin, where some were driven by activism or solidarity, and others were self-driven. Some were top-down arrangements, some self-organised, and others were bottom-up or grassroots which the government later adopted. Irrespective of how and why they were initiated, they are all underpinned by the aim of collaboration- both as co-production of the cultural practices and the governance of such practices. Furthermore, several common themes concerning cultural governance, such as the central role of the government, multiscalar collaborations, networks, and the cultural discourse, emerged as key aspects to consider for mobilisations for cultural governance.  Furthermore, the investigation also presents key aspects to consider when mobilising cultural practices. Finally, the authors call for further research and empirical evidence regarding the different aspects of CG to further its theoretical and practical advancements in cultural governance.