Thierry Van Ryswyck ( 1911 - 1958 ) was a Belgian painter. Thierry Van Ryswyck s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 2899.44 USD for Tigre en marche in 2006 to 4458.69 USD for Deux singes. in 2011 , based on the size and medium of the artwork.