Focus on A Seaport at Sunset and discuss the abstract.
A Seaport at Sunset is a 1749 oil painting on canvas by  the French artist Claude-Joseph Vernet. It depicts a sea port, and presumably a war scene. A lightouse is visible, at the center right, while several people are on land, and a number of ships on sea, engaged on combat, with cannons smoke visible, are at the left. It is held at the Timken Museum of Art, in San Diego.
San Diego Claude-Joseph Vernet Timken Museum of Art