Jean-Auguste-Dominique Ingres - Olga's Gallery - Excellent site, many works by this artist.

Francisco Goya
 

Francisco de Goya - biography and picture display, including one of the medical profession in Spain in 1791.

Goya, Francisco
 

Delacroix, Eugène

Joseph Mallord William Turner
 

Ruskin on Turner - summary of pictures through the writings of Ruskin, depicting death and dying.

Caspar David Friedrich - using one of the search engines, find a homepage with one of Friedrich's works of art.

      Caspar David Friedrich - fourteen works plus his biography