Views from St Paul's

This picture was taken through a 6" piece of plexiglass set in the center of the top of the dome in the cathedral, looking down on mass in progress. It is impossible to get perspective of how high this is other than that there are a couple hundred chairs in the picture. The thing that looks like a gear around the edge of the frame is the railing for the next highest overlook in the dome. You climb 434 stairs to get to the top observatory from which the outside pictures are taken.