On May 10, 2023 Web2Learn, as a partner in the EU-funded HEIDI project (HEIs as a catalyst for social change in the COVID-19 crisis, an Erasmus+ KA2 project), in collaboration with the Library of the University of Macedonia, organised a multiplier event combining the results of the HEIDI project with initiatives of other institutions. The aim of the event was to enrich the dialogue among Higher Education Institutions (HEIs) on the topic of active citizenship that is fostered through citizen science actions in which academic and public libraries as well as information science professionals take the lead.