CAROLINGIANS. Charlemagne (Charles the Great), as Charles I, king of the Franks, 768-814. Denier (Silver, 20 mm, 1.75 g, 3 h), Mogontiacum (Mainz), circa 793-812. ✠ CAROLVS REX FR around Karolus monogram. Rev. ✠ MOGONTIA around cross pattée. Depeyrot 579. M&G 92. Very rare. Very fine.