Franz Trenk ( 1899 - 1960 ) was an Austrian painter. Franz Trenk s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 84.24 USD for Grazer Stadtpark im Herbst in 2005 to 941.36 USD for Korcula/Dalmatien in 2008 , based on the size and medium of the artwork.