In the 2018 “Annuario Pontificio” (Pontifical Yearbook), how many Popes of the Catholic Church are listed and how many have been Jesuits?

The “Annuario Pontificio” is the annual directory of the Holy See of the Catholic Church. It lists all the popes to date (2018) and all officials of the Holy See's departments. The yearbook is updated to reflect the outcomes of ongoing research into Church history introducing corrections such as dates, especially in the first two centuries, birthplaces and biographies of the popes, from St Peter to John Paul II.

The list contains some date and nomenclature anomalies. For example, it excludes those who have been classified with hindsight as “antipopes”, i.e. those who, in opposition to the pontiffs who are generally seen as the legitimately elected popes, have made significantly supported competing claims to be pope. Also, some popes have been subject to confused interpretations of papal numbering and nomenclature, e.g. when Simon de Brion became pope in 1281, he chose to be called Martin, however, at that time, Marinus I and Marinus II were mistakenly considered to be Martin II and Martin III respectively, and so, erroneously, Simon de Brion became Pope Martin IV.

51 popes and 6 antipopes have been members of religious orders. Only one of these has been a Jesuit, the present one, Pope Francis. In 2013, Jorge Mario Bergoglio became the first Jesuit to be elected pope, the first pope from the Americas, the first from the Southern Hemisphere, and the first pope from outside Europe since the Syrian Gregory III, who reigned in the 8th century.