Justinian I
Justinian I. AE Decanummium. 527-565 AD. Ravenna. DN IVSTINIANVS PP AVG, helmeted, cuirassed bust facing, holding cross on globe and shield / Large I, ANNO to left, regnal year to right, all within wreath. No mintmark. SB 326, MIB 229.
Reference: http://www.wildwinds.com/coins/byz/justinian_I/t.html