Antonio Possevino (1533–1611) is one of the most fascinating early modern Jesuits, renowned for his political and diplomatic activities in North and Eastern Europe and the prolific author of widely circulated treatises, pamphlets, and commentaries, as well as the Bibliotheca selecta (1583), his encyclopedic masterpiece. Although he has been often quoted or referred to by recent scholarship and hundreds of articles and books on specific aspects of his life and career have been published, the most recent comprehensive biography written about him dates back to the eighteenth century, a work by the French Jesuit Jean Dorigny (1649–1731). Possevino’s intense political activity, traveling, and networking, as well as his wide-ranging, prolific, and multi-language scholarly production, make it almost impossible for a single author to write an intellectual biography of this iconic Jesuit. The Possevino Collaborative Project recognizes the need for a diverse, interdisciplinary, and collective approach. It aims to create a multi-author biography that leverages the unique skills of an international group of scholars to deepen the understanding of a Jesuit whose life can be considered a privileged prism of his times.