Franz (august Waidhofer) Demel ( 1878 - 1947 ) was an Austrian painter. Franz (august Waidhofer) Demel s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 496.03 USD for Trautenfels Castle/Grimming in 2004 to 900 USD for Interior Scene of Dining Room in 2009 , based on the size and medium of the artwork.