Edouard Dubufe – The Congress of Paris, 20 February to 30 March 1856 Château de Versailles

The picture has something of this: people, group, leader, man, many, wear, chair, woman, several, administration, group together, music, theater, monarch, royalty, room, meeting.
Perhaps it’s a painting of a group of men and women in formal dress sitting around a table in front of.