An estimated one million pilgrims are expected to descend on St. Peter’s Square on April 27 as Pope Francis elevates two Popes to Sainthood. John XXIII was the architect of the Second Vatican Council. John Paul II — the first Polish Pope — internationalized the papacy. BU News Service reporters Kirsten Johnson and Matthew Younis will join veteran Boston broadcaster and BU Journalism Prof. RD Sahl in Rome for this event. They’ll be following local pilgrims and Boston Archbishop Sean O’Malley. Check back for updates and follow @bunewsservice for more.