The Museum of the Treasure of San Gennaro is a museum in Naples, whose entrance is located next to the Cathedral and the Treasure Chapel. The museum area is over seven hundred square metres and exhibits its works in the rooms below the Chapel of the Treasure, for a series of art collections including jewellery, statues, busts, precious fabrics and paintings of great value. Among the most interesting items is a mitre (bishop's headdress) from 1713 by goldsmith Matteo Treglia, set with numerous precious stones (diamonds, rubies and emeralds). The valuable collection of silverware (about 70 pieces) is unique in its kind. Covering a period of time from 1305 to the present day, the collection is intact, having never been tampered with due to theft, and is almost entirely the work of masters of the Neapolitan school.