I should have also asked if you've examined the back of the (paper) drawing , gerspee ...
I have no clue as to the location (is it an actual perspective , or flight of fancy , etc?) , which would be the only other clue , that I can think of right now .
Is the sig 'smudged' ? Just asking , 'cuz it looks so in the images , to me ....
Researching can be fun , but if time is money , perhaps your item would be @ least a piece of art to hang on a wall !