Salvator Rosa painted history, landscape, battle-pieces, and sea-ports; and of these he was most eminent in landscape. The scholar of Spagnoletto, he attached himself to the strong natural style and dark coloring of that master, which well accords with his subjects. In his landscapes, instead of selecting the cultured amenity which captivates in the views of Claude or Poussin, he made choice of the lonely haunts of wolves and robbers; instead of the delightful vistas of Tivoli and the Campagna, he adopted the savage scenery of the Alps, rocky precipices, caves with wild thickets and desert plains; his trees are shattered, or torn up by the roots, and in the atmosphere itself he seldom introduced a cheerful hue, except occasionally a solitary sunbeam. These gloomy regions are peopled with congenial inhabitants, ferocious banditti, assassins, and outlaws. In his marines, he followed the same taste; they represent the desolate and shelvy shores of Calabria, whose dreary aspect is sometimes heightened by terrific tempests, with all the horrors of shipwreck. His battles and attacks of cavalry also partake of the same principle of wild beauty; the fury of the combatants, and the fiery animation of the horses are depicted with a truth and effect that strikes the mind with horror. Notwithstanding the singularity and fierceness of his style, he captivates by the unbounded wildness of his fancy, and the picturesque solemnity of his scenes.

Salvator Rosa wrought with wonderful facility, and could paint a well finished landscape and insert all the figures in one day; it is impossible to inspect one of his bold, rapid sketches, without being struck with the fertility of his invention, and the skill of hand that rivalled in execution the activity of his mind. He was also an excellent portrait painter. A portrait of himself is in the church degli Angeli, where his remains were interred, and he introduced his own portrait into several of his pictures, one of which is in the Chigi gallery, representing a wild scene with a poet in a sitting attitude, (with the features of Salvator); before him stands a satyr, allusive to his satiric style of poetry. During his life-time, his works were much sought after by princes and nobles, and they are now to be found in the choicest collections of Italy and of Europe. There is a landscape in the English National Gallery which cost 1800 guineas; a picture in the collection of Sir Mark Sykes brought the enormous sum of 2100 guineas.