On the Bank of the Lora, Ossian Conjures up a Spirit with the Sound of his Harp Francois Pascal Simon Gerard (1770-1837)

The picture has something of this: people, nude, Renaissance, woman, water, baroque, man, magic, cave, fish, fantasy, interaction, nymph.
Perhaps it’s a painting of a woman playing a harp in front of a group of other women with a castle in the background and a man in the foreground.