The 4 m high monolith dates to the 1st century AD and two of its four sides bear an inscription, which refers to the career of the Roman officer Caius Vibius Quartus:
C(aius) Vibius C(aii) f(ilius)
Cor(nelia) Quartus
mil(es) leg(ionis) V Macedonic(ae)
decur(io) alae Scubulor(um)
praef(ectus) coh(ortis) III Cyreneic(ae)
trib(unus) leg(ionis) II Augustae
praef(ectus) [---]
Caius Vibius Quartus, son of Caius,
from the Cornelian tribe,
soldier of the fifth legion of Macedonia,
decurion of the wing of Scubules,
commander of the third regiment of Cyrenaica,
military tribune of the second legion of Augustus, commander...