Sandro del Prete
The Spiral Staircase to the Belvedere
![The Spiral Staircase to the Belvedere](../../../../images/art/delprete/the-master-of-illusions/103.jpg)
The architect who invented this belvedere wanted to give his work a special touch,
so he built onto it this impossible staircase. Unfortunately, his staircase was not
very practical, so he installed a ladder, but the ladder ended up just as topsy-turvy.