We arrived before the museum opened, so joined the end of the queue. We were about half way down the wall; before it started moving (when the museum opened) the queue snaked around the wall at the far end of this image.
And the queue snakes on up towards the museum entrance, which is located just underneath the tower on the wall. The experience of handling large crowds clearly helps the Museum deal expeditiously with the volume of visitors, and we really had no major delays anywhere on our passage through the Museum and Sistine Chapel.
One of the side streets we passed while shuffling towards the museum entrance. It seems that apartments are the standard living arrangement, unlike Australia and the USA, where the suburban home rules.
Michelangelo's magnificent dome of St. Peter's Basilica, as seen from the Museum entrance area.