In the interior on the north, the Cappella del Corporale possesses a large silver shrine, resembling in form the cathedral façade, enriched with countless figures in relief and subjects in translucent coloured enamels - one of the most important specimens of early silversmith's work that yet exists in Italy.
Many substances were used as pigments: Pliny records white lead, cinnabar, verdigris and red oxide of iron; and the preparation of coloured glasses and enamels testifies to the uses to which these and other substances were put.
At a long interval after these beautiful objects come those vessels which were ornamented either by means of coarse threads trailed over their surfaces and forming rude patterns, or by coloured enamels merely placed on them in lumps; and these, doubtless, were cheap and common wares.
The castle of the Hohenzollerns crowns a high rock above the river, and contains a collection of pictures, an exceptionally interesting museum (textiles, enamels, metal-work, &c.), an armoury and a library.
From that time forward the Arita factories turned out large quantities of porcelain profusely decorated with blue under the glaze and colored enamels over it.