Italian States, Sicilia (Sicily, Kingdom). Frederick I (later Frederick II, Holy Roman Emperor) and Constance as Empress of the Holy Roman Empire, AV Tari. Amalfi mint, November 1198. Outer circle Kufic legend: 'struck in his reign in the year five hundred ninety-five'; inner circle Latin legend: ⧾ FRE REX SICILIE around palm tree in fruit in central circle / Outer rim Kufic legend: 'struck in the year one-hundred one-thousand ninety and eight; inner rim Kufic legend: 'Constance imperatrix of the Romans', around Latin cross in central circle. L. Travaini, 'Le monete Sveve con legend arabe nel Regno di Sicilia (1194-1220)' in RIN 1986, p.136, 2; MIR 36; MEC 14, p.166 fig. 3b; CNI XVII, p.10, 1, pl. 1, 14; G. Sambon, Repertario generale, 1113; M. Guglielmi, La monetazione degli Svevi nell'Italia meritionale, Serravalle RSM, 2000, p.67, 1; D. Spinelli, Monete cufiche, Napoli 1844, pl. 20, 1; R. Levinson, The Early Dated Coins of Europe 1234-1500, Clifton 2007, p.258; Friedberg 51. 0.87g, 24mm.

Mint State; edge clipped. Of the greatest rarity and numismatic importance.

This remarkable scyphate-shaped tari bears two dates: Hegira 595 and Christian era 1198, the earliest Anno Domini date ever recorded on a coin, which according to Philip Grierson and L. Travaini commemorates the investiture formally granted to Frederick II and Constance by Pope Innocent III on 19 November of that year. In return the pope received an annual cens of 1,000 'schifati', cf. MEC pp.165-6.

Amalfi was an independent republic from the 7th century that managed to extract itself from Byzantine vassalage in 839 and first elected an independent duke in 958. By 944 Amalfitan merchants were already present at Constantinople, trading with Egypt by the late 10th century and rivalling Pisa and Genova in its domestic prosperity and maritime trade with Asia before the rise of the Venice. In 1073 the republic fell to the Norman countship of Apulia and was granted many rights and attained great wealth. In about 1080, Amalfitans founded a hospice for pilgrims in Islamic occupied Jerusalem, from which the Order of the Hospital (St. John of Jerusalem) later developed. Under Roger II in 1131, Amalfi passed into the kingdom of Sicily and by 1220 the Empire of Frederick II. In matters of medieval culture, Amalfi was famous for its multiculturalism, flourishing schools of law and mathematics, maritime code and the reputed Amalfitan Flavio Gioia, who in about 1300 was considered first marine pilot to have introduced the sailor's compass to Western navigation.

The date on the Amalfi tari must be connected to the fact that Islamic coinage had been dated from the time of the 5th Caliph, 'Abd al-Malik in the 77th year of the Hagira, the migration of Muhammad and his followers from Mecca to Yathrib in AD 696/7. Amalfi had been within the Islamic monetary sphere strongly influenced by the Emirate of Sicily since the 10th century, in which the standard gold unit was the gold Tarì (meaning "fresh" or "newly minted money"), the Christian designation of Ruba'i or quarter Dinar with the ideal weight of 1.05g of gold.

The idea that coins should bear a date of issue referencing the time passed since the birth of Christ was not widespread in Europe until the mid 16th century. While the learned Scythian monk, Dionysus Exiguus from Tomis, formulated the Anno Domini calendar in the 6th century and is still used to enumerate the years of both the Julian and Gregorian calendars, it was not until the advent of this issue in 1198 that European coinage was so dated. This dating system was not utilised again until 1234 by the bishopric of Roskilde on its silver deniers and in 1251 in Arabic script on the Islamic styled silver coinage by the crusader city of Acre. In the spring of 1250 the papal legate Odo of Châteauroux arrived in Syria and was scandalized to learn that the Franks were striking gold and silver coins with the name and dates of the Muslim Prophet and had them substituted with purely Christian legends and dates in the name of the Messiah, albeit written in Arabic to maintain acceptability in the region. Much later from 1372 dated groschen in the name of Charlemagne were struck on a regular basis at Aachen.

Frederick II, son of Holy Roman Emperor Henry VI of the Hohenstaufen dynasty and Constance the posthumous daughter of Roger II de Hauteville and heiress to the Norman kings of Sicily, was an infant of only three years of age when his father died and was crowned king of Sicily on papal authority at Palermo cathedral on 17 May 1198. Frederick's minority under his mother only lasted five months as the regent died on 27 November 1198.