Sallembier, Henri – Gezicht op een paleis in een heuvellandschap, 1780 - 1820 Rijksmuseum: part 1

The picture has something of this: people, cavalry, water, outdoors, beach, seated, lithograph, sea, sky, seashore, military, horizontal plane, river, landscape, transportation system.
Perhaps it’s a painting of a city with a lot of people on the street and.