Farewell of Napoleon and Alexander I at Tilsit Hermitage ~ Part 05

The picture has something of this: people, group, wear, many, woman, man, group together, music, outfit, veil, recreation, landscape, vehicle, mammal, weapon, festival, child, daylight.
Perhaps it’s a painting of a man standing on a boat in a body of water with other men standing on the side of the boat in front of him.