Gubbio, in the Duchy of Urbino, is known principally by the works of Maestro Giorgio Andreoli, who seems to have monopolised the secret of the ruby and yellow metallic lustre, with which he enriched not only his own productions but put the finishing touches in lustre on the plates of Xanto and other artists from Urbino, as well as from Castel Durante. There is no doubt that the painting of the piece and the application of the metallic lustre colours were two distinct operations, and that it was painted and the colours fixed in the muffle kiln some months before it was touched with the lustre pigments, and again subjected to another baking. Giorgio was a statuary as well as a painter of maiolica, several of his sculptures in marble being yet extant. [Illustration: FIG. 6.--PLATE. "STREAM OF LIFE." _16th Century. Signed by_ M{O} GIORGIO. Diam. 7-3/4 in.] [Illustration: FIG. 7.--VASE. BY M{O} GIORGIO. H. 10-1/2 in. _16th Century._] Another painter in lustre, of the school of M{o} Giorgio, has signed his pieces with the letter N., which is supposed by some to be a monogram of Vincenzio, the son of M{o} Giorgio; and a painter named Perestino, of Gubbio, produced some very beautiful pieces, dated 1533 and 1536. PESARO Guido Ubaldo II. della Rovere, who became Duke of Urbino in 1538, was a patron of the _fabrique_ of Pesaro. The maiolica with yellow lustre, blue outlines and imbricated borders, which are assigned to Pesaro, belong to the first part of the 16th century; many of these have portraits and scrolls inscribed with the name of the person to whom they were dedicated. When Passeri visited the town in 1718, there was only one potter, making ordinary vessels. Some years after, in 1757, he sent potters from Urbania and recommenced the manufacture. According to M. A. Jacquemart, two artists of Lodi--Filippo Antonio Callegari and Antonio Casali--were also established here about the middle of the 18th century. The bowl and cover and dish, Fig. 9, painted and gilt with flowers, are signed by them with their initials. There was another _fabrique_, established by Giuseppe Bertolucci of Urbania in 1757; Pietro Lei, a painter of Sassuolo, was engaged there. [Illustration: FIG. 8.--DRUG VASE. _17th Century._] [Illustration: FIG. 9.--BOWL, COVER, AND DISH. _18th Century._] CASTEL DURANTE