As a younger artist I had a pretty good handle on 1, 2, & 3 point linear perspective. I hope to reinforce those earlier learnings which have faded some, as well as to learn the more advanced techniques I never did previously. I chose the "The Riva Degli Schiavoni in The Moonlight" because I would like to learn about shifting or changing perspective, or multiple perspectives in the same picture. I really like artist Paul Heaston's sketchbooks. He often does fish eye perspectives which I find endlessly fun to look at. I would like to know about perspective in early cartography. Not necessarily to implement it, just to understand how its done and how it differs from linear perspective.