The FIWARE Summit held in Vienna on June 12-13, 2023, focused on the integration of open data and technology to support smart city services, particularly in urban sustainability and green area management. Key discussions included the application of the NGSI-LD data model and the concept of a context broker for integrating diverse data sources to enhance decision-making in urban management. The event highlighted pilot projects from various municipalities aimed at leveraging satellite data and machine learning for urban planning and sustainability initiatives.