Sylvain Norga ( 1892 - 1968 ) was a Belgian painter. Sylvain Norga s works have been put up for auction numerous times, with realized prices varying from 717.72 USD for Cow-boy sur son cheval cabré in 2004 to 849.91 USD for Vastgeketende olifant in 2017 , based on the size and medium of the artwork.