>>7555636The painting is called "The Wild Hunt," or "The Wild Chase," variously translated as these from the German "Die Wilde Jagd." It was painted in 1889 by German artist Franz Stuck, and he did dark romanticist and expressionistic paintings, if I recall. This particular painting is foreboding and reminiscent of being within a dark forest, and suddenly looking up at the sky and seeing this horseback figure charging with a supernatural army. It is very nightmarishly surreal, a dark fantasy realized on canvas. Here is a painting of the artist.