There is a tour of paintings by Constable that is currently in the National Gallery of Art in Washington. All of his giant paintings are there. Most of them come in two versions: one painted quickly at the location and one painted slowly in the studio. The quick paintings look like impressionism. They practically all have the same layout: big trees on the left, fields on the right, details in the middle.
He painted tiny pictures, too, and some are on display. He is considered the best English landscape painter.