Maxentius AE Follis, Rome. AD 306-312.

Obv: IMP C MAXENTIVS PF AVG, laureate head right.
Rev: CONSERV VRB SVAE, Roma seated front, head left, shield
at her side, within hexastyle temple, holding globe and 
sceptre, wreath in pediment, knobs as acroteria.
Mintmark RBS.

RIC VI Rome 210.

ebay sale, Sept. 2014.