Miliaresion
In the first century of the miliaresion's issue, it appears to have been struck solely as a ceremonial coin on the occasion of the appointment of a co-emperor, and hence always features the names of two Byzantine emperors.However, by the middle of the 11th century, due to a debasement of the currency begun by Romanos III Argyros, 2⁄3 and 1⁄3 fractions of the miliaresion also began to be minted, and the military and financial collapse that occurred primarily under the Doukas dynasty in the 1060s and 1070s severely affected the quality of the coin.Following the reform, it was replaced by a low-grade billon trachy cup coin, initially worth a quarter of a miliaresion, but over the following century it was significantly devalued, especially after the collapse of the Komnenian dynasty following the death of Manuel I Komnenos in 1180.The miliaresion appears to have been mostly forgotten by the 13th century, especially after the Sack of Constantinople in 1204, but was in some ways revived in the form of the basilikon, a flat silver coin issued in the Palaiologan-era empire from roughly 1300 onward.[1][6] After the fall of the Byzantine Empire by the latter half of the 15th century, the name of the miliaresion survived as a relic in Western European languages, where the term milliarès was used for various kinds of Muslim silver coins.