True to Nature: Open-Air Painting in Europe, 1780–1870
National Gallery of ArtNearly 100 oil sketches created en plein air capture scenes ranging from a simmering Mount Vesuvius to tumultuous seas along the Baltic coast. Notable 18th- and 19th-century luminaries such as Jean-Baptiste-Camille Corot and Richard Parkes Bonington (above) are represented. nga.gov
