Joseph Beaume – Napoléon I, leaving Elba to return to France, embarks from Portoferraio on February 26, 1815 Château de Versailles

The picture has something of this: people, many, group, vehicle, crowd, man, military, battle, transportation system, landscape, woman, war, group together, wear, watercraft, ceremony, cavalry.
Perhaps it’s a painting of a group of people standing on a dock with a boat in the foreground and a crowd of people on the other side of the water.