Vintage art prints by Jan Korthals. Dated 1957. Donald art co., N.Y. Printed in Holland. Each has a number. 4 altogether with folder. Make me an offer. Have sold as high as $500.00 on e-bay. These are prints. Very collectible. Jan Korthals was considered the last Dutch impressionist. Good shape. Santa Maria, Campo St. Salvador, S. Marco, Ponte dei Sospiri Venezia are the titles.