Gros Napoleon vid Arcole, 1796, Louvre Antoine-Jean Gros (1771-1835)

The picture has something of this: people, portrait, wear, music, woman, man, side view, facial expression, jacket, musician, veil, vintage, retro, girl.
Perhaps it’s a painting of a man with long hair wearing a black coat and holding a gun in one hand and a hat on his head in the other hand.