One moment each day when it was possible to see the whole meeting together was lunchtime at the Circus Maximus. It was transformed into a vast picnic area. Photos from this Flickr page
For the early evening prayer with Pope Benedict on Saturday 29 December the number of participants was swelled by Italian groups who had come as day participants. During the course of the afternoon the whole of St. Peter’s Square filled. 45,000 people is probably no exaggeration.