The Numismatic collection of the Mdina Cathedral Museum is the only major collection of coins found in Malta available for public viewing.
It is arranged into four historical periods: Ancient Malta, which includes Carthaginian, Greek, and the Romano-Maltese coinage together with the Roman coins; the Medieval period, starting with Eastern Roman, Arab, Norman, Swabian, Angevin and Aragonese/Spanish coinage; the period of rule the Military Order of St. John in Malta between 1530 and 1798; and finally British rule, through Independence and up to the present day. The coins are exhibited from within seventeen showcases located around the hall and four other showcases in the center. Most of the display cases containing the coins have an enlarged photograph of some specimens, accompanied by both informative text and historical maps for context.
The presentation is displayed in a chronological sequence and begins with the Carthaginian coins minted between the 4th century B.C. and 146 B.C., followed by the very fine Romano-Maltese collection of coins minted in the Maltese Islands, on both Melita and Gaulos between 212 B.C. and 35 B.C., during Republican Roman rule. Showcase No. 3 displays a wide selection of Greek coins, covering those of Hellenic colonies and city-states in Magna Graecia. Showcase No. 4 displays Greek coins mostly of the Diadochi, that is, the Hellenistic Successor states which emerged after the death of Alexander the Great. The Roman period begins with Republican coins in showcase No. 5, followed by an important collection of Imperial Roman coins displaced in seven separate showcases, numbered from No. 6 to No. 12. Nearly all the Roman emperors together with their families are represented up until 411 A.D.