publishing house of Paris produced a similar yearbook in French called Annuaire Pontifical Catholique, not compiled by the Holy See. This contained much additional information, such as detailed historical articles on the Swiss Guards and the Papal Palace at the Vatican. List of popes The Annuario Pontificio provides the Catholic Church's list of popes. As historical questions are reinterpreted by each successive pope, they are recognized in the Annuario Pontificio. For example, the 1942 Annuario Pontificio recognized the decisions of the Council of Pisa (1409), listing three popes for the period: Gregory XII (1406–1409), Alexander V (1409–1410), and John XXIII (1410–1415). The Western Schism was reinterpreted when Pope John XXIII (1958–1963) chose to reuse the ordinal XXIII, citing "twenty-two Johns of indisputable legitimacy." This was reflected in the 1963 Annuario Pontificio, which treated Alexander V and the first John XXIII as antipopes. Statistical data Many churches try to obtain accurate ecclesiastical statistics by actively counting their congregants. The Annuario Pontificio superseded the French Annuaire pontifical catholique in providing global statistics on the Roman Catholic Church and arranges such data by diocese; the Statistical Yearbook of the Church arranges the same data by country and continent. According to the Annuario Pontificio 2012 the statistical data given in the yearbook regarding archdioceses and dioceses are furnished by the diocesan curias concerned and reflect the diocesan situation on 31 December of the year prior to the date on the yearbook, unless there is another indication. The data recorded are shown in the following order next to these abbreviations: Su – area in square kilometers of the diocesan territory pp – population of the diocese ct – number of Catholics pr – parishes and quasi-parishes ch – churches or mission stations sd – secular priests resident in the diocese dn – diocesan priests ordained during the year sr – religious priests resident in the diocese rn – religious priests ordained during the year dp – permanent deacons sm – seminarians taking courses of philosophy and theology rm – members of men's religious institutes rf – members of women's religious institutes ie – educational institutes ib – charitable institutes ba – baptisms Release details See also Catholic Church by country History of the papacy Vatican Publishing House References Documents of the Catholic Church Directories Secretariat of State (Holy See) Yearbooks