Johann Melchior Wyrsch ( 1731 - 1798 ) was a Swiss painter. Johann Melchior Wyrsch s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 671.03 USD for Der heilige Alois von Gonzaga in 2005 to 24441.73 USD for Portrait des Stiftpropstes Georg Ludwig Rüttimann in 2014 , based on the size and medium of the artwork.