A boy hides cards in his belt and his accomplice peeks a look at the opponent's hand in The Cardsharps.  
One work that Vincenzo Giustiniani commissioned from this artist takes its title from the Eclogues and features Cupid with eagle wings half sitting in the middle of scattered instruments. One depiction of Bacchus, with some peaches on the table and grapes in his left hand, is quite sickly, but in another painting, an attractive, slightly-drunk Bacchus clad in toga holds a goblet of wine. A boy hides cards in his belt and his accomplice peeks a look at the opponent's hand in The Cardsharps.  For 10 points, the heightened form of chiaroscuro, tenebrism, was the key feature in The Conversion of St. Paul and The Calling of St. Matthew by what painter?
One work that Vincenzo Giustiniani commissioned from this artist takes its title from the Eclogues and features Cupid with eagle wings half sitting in the middle of scattered instruments.
{Michelangelo Merisi} da {Caravaggio} [accept either underlined part]