Pope John Paul II promulgate the decree and set a date for canonisation. On 4 July 2013, Pope Francis confirmed his approval of John Paul II's canonisation, formally recognising the second miracle attributed to his intercession. He was canonised together with Pope John XXIII. The date of the canonisation was on 27 April 2014, Divine Mercy Sunday. The canonisation Mass for Blessed Popes John Paul II and John XXIII, was celebrated by Pope Francis (with Pope Emeritus Benedict XVI), on 27 April 2014 in St. Peter's Square at the Vatican (Pope John Paul had died on vigil of Divine Mercy Sunday in 2005). About
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