The Round Course at Newmarket, Cambridgeshire, Preparing for the King’s Plate Peter Tillemans (1684-1734)

The picture has something of this: people, group, cavalry, mammal, seated, many, landscape, recreation, beach, herder, water, woman, man, camel, transportation system, wear, seashore, outdoors.
Perhaps it’s a painting of a group of people on horses in a field with a building in the background and a crowd.