Last Judgement (fragment, before restoration 1990-94) Michelangelo Buonarroti (1475-1564)

The picture has something of this: baroque, cave, nude, saint, Renaissance, inside, fountain, ancient, artistic, grotto, interior, sculpture, image, marble.
Perhaps it’s a painting of a man sitting on a rock in front of a group of other men, all of which are on the same side of a wall.