In the 16th century a favourite decoration was grotesques and arabesques in blue _camaïeu_ on yellow ground, or alternately on the two colours (see Fig. 15). The reverses of the Faenza plates are frequently light blue, with concentric circles or a spiral line in a darker colour; when white, with imbrications or zones alternately blue and yellow. Another peculiarity by which the Faenza ware is known, is the presence of red. [Illustration: FIG. 15.--PLATE. ARMS AND ARABESQUES. _16th Century._] DIRUTA Many of the lustred pieces of maiolica, with light yellow lustre edged with blue, which were attributed formerly to Pesaro, have been now classed among the wares made at Diruta, from the circumstance of a plate in the Pourtalès Collection--subject, one of Ovid's Metamorphoses, being similarly decorated with the yellow lustre, and signed by El Frate of Diruta, 1541. Some specimens have "_In Deruta_" inscribed at length; others have simply the letter D with a bar through it; and early pieces have the signature of the painter, El Frate, but without the yellow lustre. [Illustration: FIG. 16.--PLATE. BLUE AND WHITE. _16th Century._] [Illustration: FIG. 17.--PLATE. INSCRIBED "SURA FIORE." _About_ 1520.] FORLÌ According to Passeri there were _fabriques_ of maiolica at Forlì in the 14th century. Its contiguity to Faenza exercised a great influence on the decoration of the ware, and the patterns on the obverses and reverses are similar. Fig. 18 has on the back "In la botega di M{o}. Jeronimo da Forli." [Illustration: FIG. 18.--PLATE. CHRIST AMONGST THE DOCTORS. Diam. 14 in. _16th Century._] RIMINI is only known by a few specimens, which are actually signed, and by the mention made of its _fabriques_ by Piccolpassi. The pieces are dated 1535, and as late as 1635. VITERBO, RAVENNA, AND TREVISO There were manufactories at these three places in the 16th century, but few specimens of their productions now exist. (See Chaffers' _Marks and Monograms_, p. 112.) The first named is illustrated (Fig. 19) by a plateau; a man at the bottom holds a scroll inscribed "VITERBO DIOMED, 1544." [Illustration: FIG. 19.--PLATEAU. DIANA AND ACTÆON. _Dated_ 1544.] CAFAGGIOLO This _fabrique_, established towards the end of the 15th century, became very important, lasting probably throughout the 16th century. The name is spelt in different ways, such as Chaffagiuolo, but Cafaggiolo is the general form. [Illustration: FIG. 20.--PLATEAU. ST. GEORGE. _Circa_ 1520.] Among the ornaments on this ware are frequently tablets with SPQR and SPQF (Florentinus), and on several the motto "Semper," adopted by Pietro de' Medici in 1470, and continued by Lorenzo il Magnifico. The device of a triangle and the word "Glovis," meaning when read backwards "si volge" (it turns), was used by Giuliano de' Medici in 1516, alluding to his change of fortune.