"LADY OF CASTILE PUYET" it is of woman being embraced from behind by a man. Any info on VALUE?

The painting appears to be very old but in excellent condition. The man is dressed in military garb and it has that gone with the wind appearance to it. It looks as if it were from a soap opera or movie advertisement but only more elegant almost regal. The frame is also VERY heavy and i can tell its expensive(the frame). The Gold Metal plate at the bottom displays the name or title ("LADY OF CASTILE PUYET") on it. Does anyone know where i can have it appraised or at least look it up online?