Constantine I, AE medallion, 33mm, 20.14g., ca. 335-347. 

VRBS ROMA, helmeted and draped bust of Roma left.
No legend, She-wolf standing left, head turned right,
suckling the twins Romulus and Remus; two stars above. 

RIC VII Rome 349 (this coin); Cohen 15; Gnecchi 6

Extremely rare. 

Contributed by Dr. Hubert Lanz, auction November 2000, 
Added July 2011.