The Third Gallery at the Theatre du Chatelet Félix Édouard Vallotton (1865-1925)

The picture has something of this: group, many, people, architecture, seat, man, theater, indoors, stadium, outdoors, ancient, wear, building, amphitheater, group together.
Perhaps it’s a painting of a group of people sitting in a lecture hall with a man standing at the front of the room and a woman.