However, it is not uncommon knowledge that behind the cathedra is a door which leads to a room. For fun, I thought some of you would be interested in this photograph captured by John Sonnen of this very room -- a room constructed, apparently, during the pontificate of Pope Leo XIII. Today, it is used for storage as you will see.
John also provides us with a rare image which shows the back of the cathedra itself, looking back toward the altar and nave.
Speaking personally, I always find it of inspiration when such beautiful details are even included in places which few would ever see.
Speaking of what is "behind the scenes" at the Lateran Archbasilica, this particular aerial photograph shows some nice glimpses of the earlier structure that lay behind the baroque facade.
(Detail from image)