For one thing, the sculpture is no longer self-contained, but interacts with the space around it. Not since the sculptures of the Hellenistic period, such as the Winged Victory of Samothrace, had sculptures been involved in their surroundings like those of Bernini. A likely source for Bernini's figure was the Hellenistic Borghese Gladiator. The motion of the gladiator preparing to attack is similar to how "David" is swinging his sling. Another difference lies in the moment that Bernini has chosen to depict. Michelangelo's "David" differs from those of Donatello and Verrocchio in that it shows David preparing for the battle, rather than victorious afterwards. Bernini, on the other hand, chose to portray David in the act of throwing the stone. This represented a novelty; throwing figures were extremely rare in post-Antiquity sculptures. The motion motif did exist in painting, however, and one example was Annibale Carracci's fresco of the Cyclops "Polyphemus" throwing a stone. Bernini is likely to have known Carracci's "Polyphemus"; not only was it to be found in the Galleria Farnese in Rome, but Carracci was the painter Bernini ranked as fourth among the greatest ever.