Unknown artist. Landscape with saint, 16th-18th centuries

Landscape with saint, 16th-18th centuries. Oil on canvas mounted on plate. 25 x 21 cm (29.5 x 25.5 cm). The plate on the back provided with salmon seal, where can be read '...lokere...' in the circumscription and P.A. in the center. Has patina, wormhole, needs cleaning.