Rare type of altar.
Roman Imperial
Hadrian (117-138), Sestertius 134-138, Rome mint
Obverse: laureate head to right, slight drapery on far shoulder
HADRIANVS AVG COS III P P
Reverse: Hadrian standing on left, togate, and Mauretania on right, in short tunic, holding patera over flaming altar between them and vexillum, SC in exergue
ADVENTVI AVG MAVRETANIAE
Diameter 31 mm, weight 23.71 g