Johannes Jacob Hartmann ( 1680 - 1730 ) was a Czech painter. Johannes Jacob Hartmann s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 61351.65 USD for Gegenstücke: Predigt des Johannes und Wundersame Heilung in 2005 to 164500 USD for LANDSCAPE WITH THE CONVERSION OF ST. PAUL; LANDSCAPE WITH ST. JOHN THE BAPTIST PREACHING in 2013