Svjatoslav Nikolaevich Roerich ( 1904 - 1993 ) was a Russian painter. Svjatoslav Nikolaevich Roerich s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1251.81 USD for ORIENTAL HORSEMEN in 2005 to a remarkable record 2994500 USD for Portrait of Nicholas Roerich in a Tibetan Robe in 2009 , based on the size and medium of the artwork