Focus on The Polish Rider and discuss the abstract.
The Polish Rider  is a seventeenth-century painting, usually dated to the 1650s, of a young man traveling on horseback through a murky landscape, now in The Frick Collection in New York. When the painting was sold by Zdzisław Tarnowski to Henry Frick in 1910, there was consensus that the work was by the Dutch painter Rembrandt. This attribution has since been contested, though those who contest it remain in the minority.
There has also been debate over whether the painting was intended as a portrait of a particular person, living or historical, and if so of whom, or if not, what it was intended to represent.  Both the quality of the painting and its slight air of mystery are commonly recognized,  though parts of the background are very sketchily painted or unfinished.
Dutch Henry Frick Rembrandt New York The Frick Collection Zdzisław Tarnowski Frick Collection