This section examines Antonio Possevino’s activities across various political, cultural, and religious contexts. Designed as a supplement to the Biography, it aims to provide a collaboratively authored encyclopedia that highlights Possevino’s intellectual contributions, travels, encounters, roles within the Society of Jesus and the Catholic Church, political connections, and significant bibliographical output. Like the Biography, this section will gain from the contributions of international scholars who have uncovered traces of Possevino in different parts of the world.