An Atelier in the Batignolles Ignace-Henri-Jean-Theodore Fantin-Latour (1836-1904)

The picture has something of this: people, group, opera, wear, performance, leader, man, theater, room, theatre, furniture, administration, woman, museum, seat, chair, stage.
Perhaps it’s a painting of a group of men standing in front of a easel with a man holding a book in one hand and a man.