obolus
ocrea
Octavia1
Octavius
olla2
Olympus
Pieria, Olympus, Thessalia, Peneus, Tempe, Aegeum Mare
onager2
orator
Ortygia2
Syracusae, Achradina Porta, Agora, Murus Dionysii, Portus minor, Sepulchrum Dionysii, Arx, Templum Artemidis, Portus major, Ortygia, Templum Minervae, Pons. Arethusa
oscillum1
Osiris
Ostia
Portus Claudii, Portus Trajani, Tiberis F., Ostia, Via Severiana, Mare Inferum