Arnaldo do Espírito Santo is an Emeritus Professor at the Univ of Lisbon, where he held teaching and management roles at the Faculty of Arts. He is a researcher at the Center for Classical Studies, of which he was Director (2009-2010), and coordinator of the Sapientia Asiatica research line. He is the Principal Investigator of the Res Sinicae Project, funded for a period of three years by FCT (Foundation for Science and Technology) Title: Res Sinicae; Digital base of documentary sources in Latin and Portuguese about China (16th-18th centuries); Survey, Editing, Translation and Studies. He is a researcher at the Europa Renascens Project, which groups together more than three dozen European universities. He developed research into the history of classical antiquity, classical culture and languages, Latin culture of the Middle Ages and Renaissance, and classical Portuguese literature. Under his guidance were completed, with the highest ratings, numerous doctoral and master's theses, as well as post-doctoral projects. He published around 150 works, including books, book chapters, and articles. He was a member of the Organizing Committee and or the Scientific Committee of more than three dozen congresses, part of which as President. He gave lectures and conferences in Portugal and abroad (Spain, France, Italy, Greece, Brazil, Egypt, and Cape Verde). He has participated in international projects, including the one that, for more than ten years, in partnership with the Univ. of Santiago de Compostela, published the repertoire of Hispanic authors who wrote in Latin, and their respective works and editions in the period from 1350 to 1560 (Hislampa) and the trilingual edition project (Latin Portuguese Castilian) of Escalígero's Poetices libri, in which the Universities of Granada, Lisbon, Aveiro, Minho, and Católica Portuguesa collaborated. Of his scientific activity, the following stand out: coordinating the translation of the Confessions and the treatise Trinity of Saint Augustine; the critical edition and translation of the Clavis Prophetarum and the coordination of the critical edition of the Sermons of Father António Vieira; the translation of the History of Two Lovers by Aeneas Sílvio Piccolomini (15th century), the Poetic Art of Marco Girolamo Vida (16th century) the Res Aedificatoria of Leon Battista Alberti (15th century) and the translation from the unpublished Latin letters of Father Tomás Pereira (1645-1708), missionary in China; the critical edition with translation and notes of De Nauigatione (Treaty of Navigation) by Diogo de Sá (16th century). Currently, he participates in the critical edition project of Os Lusíadas, under the organization of the Camonian Studies Center of the Univ of Coimbra and the Brazilian Academy of Letters. He is the author of several studies on the Renaissance and the 17th century. He received the Grand Prize for Translation from the Portuguese Pen Club Portuguese Association of Translators (2001) and, three times, the Prize for Scientific and Technical Translation in the Portuguese Language, União Latina FCT (2001; 2008; 2011). With Cristina Costa Gomes, he obtained an Honorable Mention awarded by the Navy Academy for the work: Diogo de Sá, De Navigatione Libri Tres, Sobre A Navegação, Critical edition of the text in Latin, translation and notes by Arnaldo do Espírito Santo, Introd. by Cristina Costa Gomes (Marine Academy and Center for Classical Studies, University of Lisbon, Lisbon 2017). He is a Member of the Scientific Society of the Catholic University, a Member of Merit of the Portuguese Academy of History, and a Member of the Pontificia Academia Latinitatis (Vatican). He was a member of the Scientific Council of Social Sciences and Humanities of the Foundation for Science and Technology, and the Director of the Institute of Culture and Portuguese Language of the Faculty of Arts of Lisbon. He is President of the Association for the Development of the Faculty of Arts of the Univ. of Lisbon.