Constantin Ernest Adolphe Hyacinthe Guys (after) ( 1802 - 1892 ) was a French painter. Constantin Ernest Adolphe Hyacinthe Guys (after) s works have been put up for auction numerous times, with realized prices varying from 375 USD for Back Stage at the Ballet in 2007 to 406 USD for The Wedding in 2011 , based on the size and medium of the artwork.