Louis-Philippe (1773-1850) is sworn in as king before the Chamber of Deputies, 9th August 1830 Eugene Francois Marie Joseph Deveria (1808-1865)

The picture has something of this: people, many, group, ceremony, performance, wear, woman, man, music, priest, stage, leader, crowd, veil, dancing, festival.
Perhaps it’s a painting of a crowd of people standing in front of a stage with a man in a white suit and a woman in a red dress on the stage.