A light-weight gold denomination with the value of c. 22-22 ½ carats. The coin was introduced under Emperor Nikephoros II
Phokas (r. 963-969) and continued to be struck until the monetary reform of Alexios I Komnenos (r. 1081-1118) in 1092. During
the eleventh century, the coin went through various phases of debasement, with the gold content plummeting in the 1080s.