Giordano had the rare talent of being able to imitate the manner of
every master so successfully as frequently to deceive the best judges;
he could do this also without looking at the originals, the result of a
wonderful memory, which retained everything once seen. There are
numerous instances of pictures painted by him in the style of Albert
Durer, Bassano, Titian, and Rubens, which are valued in commerce at two
or three times the price of pictures in his own style. In the church of
S. Teresa at Naples, are two pictures by him in the style of Guido, and
there is a Holy Family at Madrid, which Mengs says may be easily
mistaken for a production of Raffaelle. Giordano also had several
scholars, who imitated his own style with great precision.