Jacob Matthias Weyer ( 1620 - 1670 ) was a German painter. Jacob Matthias Weyer s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 2764.22 USD for A CAVALRY BATTLE SCENE IN A LANDSCAPE in 2004 to 14143.43 USD for Battle between Turks and Christians. in 2011 , based on the size and medium of the artwork.