275 AD., Severina, Rome mint, silvered Æ Antoninianus, RIC 4.

Ulpia Severina, wife of Aurelian, Rome mint, 1st officina, 275 AD.,
silvered Æ Antoninianus (21-22 mm / 3.79 g),
Obv.: SEVERIN-A AVG , diademed, draped bust right on crescent.
Rev.: CONCORDI - AE - MILITVM / A / XXIR , Concordia standing facing, head left, holding two standards, A (=officina 1) in right field, XXIR in exergue.
RIC 4 ; C. 7 ; MIR 154a .

Severina was the wife of Aurelian and was made Augusta c.274. When her husband was killed in battle it's believed that she ruled, if only nominally, during the interregnal period before Tacitus was nominated the next emperor. Severina may well have headed a regency council that ruled the Empire for a short period prior to the appointment of Tacitus to the throne.