AU Coinage
AU is the symbold for gold, in its purest form a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal.

Gold was used in commerce (beside other precious metals) in the Ancient Near East since the Bronze Age, but coins originated much later, during the 6th century BC, in Anatolia.

King Croesus of Lydia is usually credited with the invention, although the Parian Chronicle mentions Pheidon of Argos as a contender. In 546 BC, Croesus was captured by the Persians, who adopted gold as the main metal for their coins.

AU

(1) Justin II Jan. 566 AD
Obverse: D N I - VST - INVS PP AVI, Helmeted bust facing, holding Victory on globe and shield.
Reverse: VICTORI - A AVGGG ? (officina 4) around, CONOB in exergue, Constantinipolis seated facing, head r., holding spear and cross on globe.
Ref: Berk-59, Hahn-4, Sear-344.
(2) Leo I 462-466 AD
Obverse: diademed, helmeted and cuirassed 3/4 facing bust, spear over shoulder; D N LEO PE_RPET AVG
Reverse: Victory standing left with long cross; VICTORI_A AVGGG B / * / CON OB
Ref: RIC X 605, DOC 528
(3) Magnentius 350-353 AD
Obverse: Magnentius
Reverse: Magnentius standing on galley
Ref: None provided
(4) Maurice Tiberius 590-602 AD
Obverse: DN mAVRC TIb PP AVG, Bust of Maurice facing, wearing plumed helmet, and cuirass, holding cross on globe
Reverse: VICTORIA AVGGI, Angel standing facing, holding long P-headed cross, and cross on globe; CONOB in exergue
Ref: SB 478
(5) Phocas 602-610 AD
Obverse: Crowned, draped and cuirassed bust facing, holding globus cruciger.
Reverse: Angel standing facing, holding globus cruciger and long staff surmounted by staurogram; I//CONOB.
Ref: MIBE 9; DOC 10j; S. 620.
(6) Valens 369 AD
Obverse: DN VALENS P F AVG, Bust of Valens facing right, wearing pearl diadem, cuirass, and drapery
Reverse: GLORIA REIPVBLICAE, Roma and Constantinople facing each other, each holding a scepter and together holding a shield inscribed VOT V MVLT X; SMNI in exergue
Ref: RIC IX 13b.2 var.
(7) Valentinian II AD 389-391
Obverse: D N VALENTINIANVS P F AVG, pearl-diademed, draped and cuirassed bust right
Reverse: VICTORIA AVGG, Valentinian II and Theodosius seated facing on throne, holding globe between them; palm between legs, figure of Victory with wings spread above; T-R across fields, COM in exergue
Ref: RIC 90a; Depeyrot 53/1
(8) Zeno 476-491 AD
Obverse: DN ZENO PERP AVG, Bust of Zeno facing slightly right, wearing helmet, pearl diadem, and cuirass, holding spear in right hand behind head and shield decorated with horseman on left arm
Reverse: VICTORIA AVGGG, Victory standing facing left, holding long jeweled cross; star in left and right fields; CONOB in exergue
Ref: RIC X Zeno (East) 939