Queen Victoria and Prince Consort Albert as guests of King Louis Philippe of France, in Chateau d’Eu, 1845 Franz Xavier Winterhalter (1805-1873)

The picture has something of this: group, people, woman, wear, veil, many, child, man, leader, dancing, royalty, ceremony, performance, room, priest, theater.
Perhaps it’s a painting of a group of people posing for a picture in a room with paintings on the walls.