Focus on this artwork and analyze the The Wheat Field.
Van Gogh worked on a group of paintings The Wheat Field based on the field of wheat enclosed by a wall that he could see from his cell at Saint-Paul Hospital. Beyond the field were the mountains from Arles.  During his stay at the asylum he made about twelve paintings of the view of the enclosed wheat field and distant mountains. In May Van Gogh wrote to Theo, "Through the iron-barred window I see a square field of wheat in an enclosure, a perspective like Van Goyen, above which I see the morning sun rising in all its glory."  The stone wall, like a picture frame, helped to display the changing colors of the wheat field.
Theo The Wheat Field Arles the enclosed wheat field asylum