Johannes Lingelbach – Charles II (1630-1685) stopping at the Estate of Wema on his Journey from Rotterdam to The Hague, 25 May 1660 Mauritshuis

The picture has something of this: people, many, group, crowd, cavalry, festival, vehicle, man, military, wear, group together, army, ceremony, competition, daylight, seated, mammal, soldier, tourist.
Perhaps it’s a painting of a group of people riding on the backs of horses in front of a crowd of onlookers and onlookers.