Mariology of the popes John Paul II), visits to Marian shrines (Benedict XVI in 2007) and by actively supporting the fathers of Vatican II as they highlighted the importance of Marian veneration (Popes John XXIII and Paul VI) in "Lumen gentium". Popular views like the Assumption and the Immaculate Conception developed into papal teaching over time. Popes have also limited and cautioned against some devotional practices. In 1674 Pope Clement X (1670–1676) indexed books on Marian piety. After the Council of Trent, "Marian fraternities" were founded, fostering Marian piety, not all of which were approved. Not all Popes took the same view on Marian
Prophecy of the Popes called "Purported prophecies", that the high level of accuracy of the alleged prophecies up until the date they were published, compared with their high level of inaccuracy after that date, is evidence that they were created around the time of publication. The prophecies and explanations given in Wion correspond very closely to a 1557 history of the popes by Onofrio Panvinio (including replication of errors made by Panvinio), which may indicate that the prophecies were written based on that source. One theory to explain the creation of the prophecies, put forward by 17th-century French priest and encyclopaedist Louis Moréri, among