Manfred Kielnhofer ( 1967 - ) is a painter. Manfred Kielnhofer s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 367.11 USD for Wächter der Zeit (guardian of time) in 2014 to 1069.8 USD for Guardians of Time in 2017 , based on the size and medium of the artwork.