VATICAN CITY – Look for a huge social media blitz when Popes John Paul II and John XXIII are canonized as saints Sunday.
The Vatican's already preparing for hundreds of thousands of pilgrims to flood the city.
It's part of an effort to reach younger audiences, according to the Vatican's communication director.
Check out old video of John Paul II's visit to St. Louis below:
Chronicling Pope John Paul II's visit to St. Louis
History of Catholicism in St. Louis
Pope John Paul II's first visit to St. Louis in 1969
Special papal beer brewed for Pope John Paul II's visit
Local Jews react to Pope John Paul II's visit to St. Louis
Local protestant reaction to Pope John Paul II's visit
A look back at the 1999 visit by Pope John Paul II
Pope John Paul II meets sick children during STL visit