The last Jubilee Year was in 2000. The ritual marks the beginning of the Jubilee Year of Mercy. At this ceremony today participated more than 50,000 people, including Italian Prime Minister Matteo Renzi, Italian President Sergio Mattarella and members of the Belgian royal family. But Pope Francis has rewritten the rules and said that every Catholic cathedral in the world may designate a holy door to be opened for a year. To receive a full indulgence (called a plenary indulgence, people must walk through the Holy Doors, go to confession, receive communion and pray for the intentions of the pope.