Isaac Willaerts ( 1620 - 1693 ) was a Dutch painter. Isaac Willaerts s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 5329.62 USD for An admiral on horseback in front of a steep coast, with ships in the background, traces of signature right below in 2004 to 43702.82 USD for Holländische Küstenlandschaft mit Schiffen und Staffag