Augustin Ritt ( 1765 - 1799 ) was a Russian painter. Augustin Ritt s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 189.48 USD for Portrait de Monsieur de Bonnemaison in 2008 to 19685.24 USD for PORTRAIT OF GRAND DUKE ALEXANDER PAVLOVICH, AFTERWARDS ALEXANDER I, EMPEROR OF ALL THE RUSSIAS (1777-1825) in 2008 , based on the size a