Tomi Ungerer ( 1931 - 2019 ) was an American painter. Tomi Ungerer s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 184.15 USD for Untitled in 2004 to 5529.66 USD for Zu: Schutzengel der Hölle in 2012 , based on the size and medium of the artwork.