<Li> Receiving, even by radio or television, the blessing given by the Pope Urbi et Orbi (to the city of Rome and to the world) or that which a bishop is authorized to give three times a year to the faithful of his diocese . </Li> <Li> Taking part devoutly in the celebration of a day devoted on a world level to a particular religious purpose . Under this heading come the annual celebrations such as the World Day of Prayer for Vocations, and occasional celebrations such as World Youth Day . </Li> <Li> Taking part for at least three full days in a spiritual retreat . </Li> <Li> Taking part in some functions during the Week of Prayer for Christian Unity . </Li>

When did the catholic church get rid of indulgences