The launch conference in Croatia was held in two parts. The first part took place in the City of Zagreb on 18 September 2023 and was organised primarily for financial experts and project developers since building specialists were engaged through a separate Launch event, Arhibau conference, on 27 September 2023. The events were used to present the main objectives and activities of the MESTRI-CE project and to engage financial stakeholders and building specialists in upcoming activities. All present stakeholders expressed their interest in joining the regional working group and participating in the piloting of green financing tools and models, as well as SMART Data Hub and Sustainable building methodology for (re)construction of buildings within the MESTRI-CE project.