Pope Francis made a visit on Thursday to one of the largest prison complexes in Italy, opening a special "Holy Door" for the 2025 Catholic Holy Year, in what the Vatican said was the first such action by a Catholic pontiff.

Pope Francis inaugurated his Holy Year at Rome’s main prison on Thursday, bringing a message of hope to inmates and involving them in the Catholic Church’s once-every-quarter century celebration that is expected to bring some 32 million pilgrims to Rome.

Amid security worries, millions of pilgrims are expected to descend on Rome for a Jubilee Year of major Catholic celebrations throughout 2025. Here are the highlights.