1/4 Dinar 'Tarì' - Al-Mustansir Billah

Al-Mustansir's reign of 58 years is the longest of any Fatimid caliph — and among the longest of any Islamic ruler — but it was far from stable. The catastrophic famine and civil strife of the 1060s–70s, known as the "Great Calamity," so devastated Egypt that the Fatimid treasury was reportedly stripped bare and the court library sold off. Gold coinage continued, but the economic disruption of those decades is occasionally reflected in reduced fineness on issues from the period.

The Sicilian tarì derives its name and fractional weight standard directly from this Fatimid type, transmitted through the Norman conquest of the island after 1072.