Johann Nepomuk Geller ( 1860 - 1954 ) was an Austrian painter. Johann Nepomuk Geller s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1285.02 USD for Courtyard in Wachau (?) in 2003 to 8220.3 USD for Sonntag im Prater in 2004 , based on the size and medium of the artwork.