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.

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.

The Jubilee ceremony begins with Pope Francis opening the Holy Door at St Peter's Basilica. The ceremony includes prayers in Latin and Italian, symbolising forgiveness, as the Pope crosses the threshold to start the Holy Year.