Jan Kupetzky (attributed To) ( 1666 - 1740 ) was a German painter. Jan Kupetzky (attributed To) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 799.24 USD for Portrait de l'archiduc Léopold d'Autriche in 2012 to 7971.94 USD for Portrait of the Prince Elector Charles Albrecht of Bavaria (1697- 1745), the future Emperor Charles V