Divus Romulus. 309-312 AD. AE Follis. 

IMP MAXENTIVS DIVO ROMVLO NV FILIO, bare head right / 
AETERNAE-MEMORIA, Hexastyle temple with domed roof, right 
doot open, surmounted by eagle standing right, looking back. 

Mintmark MOSTT. 
RIC VI 33. 
With permission of Gorny & Mosch, March 2005.