The Concert in an Egg (Copy after a lost original) Hieronymus Bosch (1450-1516)

The picture has something of this: people, room, group, furniture, woman, wear, reclining, seat, man, family, son, indoors, child, two, music, facial expression.
Perhaps it’s a painting of a group of people sitting on top of a giant egg with a sheet of paper hanging from the top of it’s side.