Evidently the subject must not only have been popular among collectors but must have caught the fancy of artists as the composition of Apollo and Marsyas is reproduced in a bas-relief of a fine door formerly in Cremona and now in the Louvre Museum. The one at Naples is repeated almost identically in a cornelian of the _Cabinet des Medailles_, in a portrait of a young girl, attributed to Botticelli, in the Staedel Museum of Frankfurt; on the frontispiece of a work executed for Mathias Corvinus; on a frontispiece of the Sforziade, that rare work kept in the library of the Riccardi in Florence; on a majolica dish of the fifteenth century, now in the Correr Museum in Venice. There is a plagiarism of this subject in a work by Raphael in the Vatican. The following examples, however, are perhaps more typical of an intentional transformation, a somewhat reversed case and an exception to the rule in this sort of faking, namely a Christian subject turned into a pagan one for the benefit of the fifteenth-century amateurs. There still exist in San Pietro in Vincoli in Rome, two bas-reliefs representing two incidents in the life of the saint who has given the church its name, one when he is arrested and put to prison, the other when he is chained in his cell and liberated by the angels. The two bas-reliefs, wrongly attributed to Pollaiolo, were ordered from some Roman artist in the year 1477 by Sixtus IV, then a simple cardinal. Of each of these bas-reliefs there is a modified reproduction, one in the Louvre and the other in the Victoria and Albert Museum, and the modifications of both are such as to make people believe them to be pagan subjects and antique work. In the reproduction kept in the Louvre the transformation of the subject without much alteration of the work is so evident that we can see how easily old collectors were taken in by these curious pieces of _truquage_. Of a more naive, but no less efficient character is the transformation inflicted upon the bas-relief of Kensington. Here in order to transform the miraculous liberation of Saint Peter into the freeing of a Roman senator it has sufficed to clip the angel’s wings, both inside the prison--the work being divided into two different moments of the action--and where the saints usher the apostle into the street. [Illustration: _Photo_: _Alinari_ MARSYAS An excellent work by Pollajolo after the antique.]