Giovanni Battista Castiglione ( - ) is an Italian painter. Giovanni Battista Castiglione s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1197.8 USD for Circe in 2005 to 2598.37 USD for Zwei Hirten mit einem Lastesel in 2007 , based on the size and medium of the artwork.