Hadriani ad Olympum, or simply Hadriani or Hadrianoi (Ancient Greek: Ἁδσιάνοι), was a town of ancient Bithynia, not far from the western bank of the river Rhyndacus. It was built, as its name indicates, by the emperor Hadrian, and for this reason did not exist in the time of Ptolemy. As its name indicates, it was situated on a spur of Mount Olympus, and 160 stadia to the southeast of Poemanenus. Hadriani was the birthplace of the rhetorician Aelius Aristides, who was born in 117. In the ecclesiastical writers the town is known as the see of a bishop in the Hellespontine province. No longer a residential see, it remains a titular see of the Roman Catholic Church.
Its site is located near Orhaneli in Asiatic Turkey.
This article incorporates text from a publication now in the public domain: Smith, William, ed. (1854–1857). "Hadriani". Dictionary of Greek and Roman Geography. London: John Murray.
Coordinates: 39°54′24″N 28°59′19″E / 39.906719°N 28.988621°E