The link is broken??? Bummer.
It was a typical Canaletto painting; but typical Canaletto is wonderful for
time-travel to ancient Venice.
Today there is photography and therefore Canaletto is not now considered
such a great artist; but we of the general public continue to spend hours
in the museums standing in front of his paintings because they are so very
photographic. Hey, photography is an art, as well! Canaletto painted great
photographs of the Venice of his time.
The painting showed Piazza San Marco looking towards the Basilica S. Marco,
with all the buildings looking just as they do today but with all the
people and their activities so different.