Opera singer Andrea Bocceli gave a moving performance in Milan’s empty Duomo cathedral but to a global online audience for Easter Sunday. The Italian tenor opened his performance with a message of hope and then walked down the cathedral aisle and out to its steps to sing "Amazing Grace", while visuals of empty streets of Paris, London and New York were shown. Bocelli was accompanied only by the cathedral organist, playing one of world's largest pipe organs. More than 5 million viewers watched.