Adolf Friedrich Harper ( 1725 - 1806 ) was a German painter. Adolf Friedrich Harper s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 3980.57 USD for Zugeschrieben. Ruinenlandschaft mit Figurenstaffage bei Vollmond. in 2004 to 19732 USD for Trompe l'œil à la gravure : Paysage d'estuaire in 2005 , based on the size and medium of