The result of all our inquiries may be summed up in this contradiction, that Roman ceramic art deserving of the name is Greek, and that the potters who were Roman have left little beyond household wares to attest their skill.
With the fall of the Roman Empire the art, which had long been declining, disappeared from view. Pottery must, no doubt, have been produced. The household necessities of the people must have been satisfied, even amidst internal disruption and barbarian invasions; but there is no evidence that anything worthy of being called an art was kept alive. The revival of the ceramic art of Italy must be dated from the time of Luca della Robbia, in the fifteenth century. To account for the forms it took, an endeavor must be made to join it on to the different branches which preceded it elsewhere. The only danger to be incurred is that of being confused by the multiplicity and yet substantial unity of its sources. Without repeating what has been said in the chapter devoted to the fountains of European art, let it be remembered that, in the year 827, the Saracens conquered Sicily, and that they introduced into that island a manufacture similar to that found in Spain. They embellished the mosque of Palermo with tiles like those of the Alhambra, and these tiles were afterward imitated in works produced in Sicily itself. Afterward, in the fourteenth century, Moorish works were established at Calata Girone, or Caltagirone, in Sicily, and some pieces attributed to them are decorated with copper lustre upon stanniferous enamel. To this period belong the Siculo-Moresque vases in the Castellani collection, which date from the fourteenth century downward (Fig. 201). It is observable that the metallic lustre does not appear in the earlier pieces, which have an unmistakably Persian style of decoration. One specimen will suffice, viz., an oval vase covered with a silicious glaze, and decorated in blue and black, with gazelles and inscriptions. Meanwhile Venice and other maritime cities on both sides of the Italian peninsula were developing an extensive trade with the East. The Crusaders had been converting the old battle-ground of the Jews into the scene of another strife, in which Judaism was ignored. Mohammed preached the gospel of the sword, and the Christians took up the gauntlet thrown down by the Saracens. Is it not possible that by these two courses--trade, and the movements of followers of the Cross--some inklings of Persian art may have crept into Italy?