The Grand Canal, Venice, Looking South toward the Rialto Bridge by Canaletto

This is Canaletto's 'The Grand Canal, Venice, Looking South toward the Rialto Bridge,' painted in 1734 and now at The Metropolitan Museum of Art. At first glance it is a postcard-perfect vista of 18th-century Venice, but the painting functions as something more precise: a coded map of commercial power.

Look at the two anchoring structures. On the left, the Rialto Bridge with its crowded market arcades at the base. On the right, the long colonnade of the Fondaco dei Tedeschi, the German merchants' exchange. These were the two most important trading hubs in the Republic. Canaletto has placed them opposite each other across the water, framing the busiest stretch of the Grand Canal.

Canaletto painted this during the height of the Grand Tour, when wealthy British travelers collected his vedute as souvenirs. He likely used a camera obscura to achieve the lens-like recession of the distant rooflines. The gondolas and barges in the foreground, including the black private cabin called a felze, document the social layers using the waterway, from hidden elites to standing gondoliers.

Every balcony, arcade, and vessel is a working piece of the Venetian economy. What other details do you notice in the margins of the city?