Anastasius I. AE38 Follis. Constantinople mint. Struck AD 512-517 AD. 

DN ANASTASIVS PP AVG, pearl-diademed, draped, and 
cuirassed bust right.
Large M, star to left, cross above, star to right, G
below.
Mintmark CON. 

Sear Byz 19; DOC I 23; MIB I 27.