Trachy (currency) in the context of Aspron

In the Middle Ages, the term bezant (Old French: besant, from Latin bizantius aureus) was used in Western Europe to describe several gold coins of the east, all derived ultimately from the Roman solidus. The word itself comes from the Greek Byzantion, the ancient name of Constantinople, the capital of the Byzantine Empire.

The original "bezants" were the gold coins produced by the government of the Byzantine Empire, first the nomisma and from the 11th century the hyperpyron. Later, the term was used to cover the gold dinars produced by Islamic governments. In turn, the gold coins minted in the Kingdom of Jerusalem and County of Tripoli were termed "Saracen bezants" (besantius saracenatus), or "fake dinars" (dīnār ṣūrī), since they were modelled on the Fatimid dinar. A completely different electrum coin based on Byzantine trachea was minted in the Kingdom of Cyprus and called the "white bezant".

Histamenon (Greek: ἱστάμενον [νόμισμα], histámenon [nómisma] lit. 'standard coin') was the name given to the gold Byzantine solidus when the slightly lighter tetarteron was introduced in the 960s. To distinguish the two, the histamenon was changed in form from the original solidus, becoming wider and thinner, as well as concave (scyphate) in form. Later usually shortened to stamenon (Greek: στάμενον), it was discontinued after 1092. In the 12th and 13th centuries, the name stamenon came to be applied to the concave billon and copper trachea coins.