The Maas at Dordrecht, Aelbert Cuyp
On Google Art Project. Hi-res downloadable on Wikimedia Commons. Original is in the National Gallery of Art, DC.
Cuyp’s 1650 portrayal of the Maas River at his hometown of Dordrecht, during a historic gathering of a military force in 1646.
See my post on Aelbert Cuyp.