Gustave Boulanger – Rehersal of The Flute Player and The Wife of Diomedes in the atrium of Prince Napoleon’s Pompeian house in Paris in 1860 Château de Versailles

The picture has something of this: people, group, woman, wear, man, temple, ceremony, castle, furniture, monk, worship, indoors, many, festival.
Perhaps it’s a painting of a group of people in a room with paintings on the walls and a dog laying on the floor in front of the room.