BALTSPACE is a collaborative project focused on sustainable marine spatial planning (MSP) in the Baltic Sea region, funded from 2015 to 2018 by the European Union and various national institutions. The project aims to address integration challenges in marine governance, develop context-specific MSP tools, and facilitate stakeholder engagement through an extended peer review process. Key focus areas include cross-border collaboration, analysis of diverse MSP contexts, and implementing effective planning tools to enhance governance in the marine environment.