Marcian, AE4, Constantinople, 450-457 AD. 11mm, 0.83 g. 

DN MARCIANVS PF AVG, pearl diademed, draped, cuirassed bust right.
Monogram type 2 within wreath, cross in circle above. 

Mintmark CON. 

RIC X 546; MIRB 29.

With permission of Numismatica Ars Classica, May 2015.