The purpose of this publication is to provide insight into the dynamics of heritage-based entrepreneurial ecosystems within Historic Urban Areas. In this report, the focus lies on analysing how ecosystem elements are put in place for specific initiatives that emerge within larger urban heritage-based ecosystems, and on characterizing their (potential) contributions to the overall ecosystem. This is done based on an analysis of the first 80 cases of the HUB-IN Atlas, according to the Entrepreneurial Ecosystem Framework, as outlined in previous work of HUB-IN.