Canaletto (1697-1768) was known to use the camera obscura.
Here's his painting of Piazza San Marco (1740) in Venice from the collection of the Detroit Institute of Art... Note the church at the termination of the Piazza. When Napoleon captured Venice, he had it removed to make way for additional administrative offices.
... and a view taken from an elevated vantage point (2014). Note Napoleon's "update."
Here's another camera obscura sketch by Canaletto (1740) from the archives of the Acadamia in Venice. Cartoons like this guided the execution of the final painting.
... and a 2014 image NOT quite from the same position as the artist, but you get the point.
Cheers... M