Entrevue de Napoléon et du baron de Dalberg à Aschaffenbourg, 2 octobre 1806 – Debret, Jean-Baptiste Château de Versailles

The picture has something of this: people, architecture, tree, group, outdoors, many, building, sky, city, daylight, tourist, town, crowd, house, landscape, church.
Perhaps it’s a painting of a large group of people by a river with a castle in the background and a crowd of people on the other side of the river.