Charles Leopold Grevenbroeck ( 1730 - 1759 ) was a painter. Charles Leopold Grevenbroeck s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 12048.79 USD for A busy port with three-masters, a tower in the left foreground and mountains beyond; and A coastal inlet with three-masters and in 2007 to 77134.5 USD for Unknown in 2015 , ba