Olbia or Arsinoe (

Greek Greek may refer to: Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group *Greek language, a branch of the Indo-European language family **Proto-Greek language, the assumed last common ancestor of all kno ...

: ) was an ancient city in the Regio Troglodytica upon the western coast of the

Red Sea The Red Sea is a sea inlet of the Indian Ocean, lying between Africa and Asia. Its connection to the ocean is in the south, through the Bab-el-Mandeb Strait and the Gulf of Aden. To its north lie the Sinai Peninsula, the Gulf of Aqaba, and th ...

between Philoteras ( Quseir or Kosseir) and Myos Hormos. (

Strabo Strabo''Strabo'' (meaning "squinty", as in strabismus) was a term employed by the Romans for anyone whose eyes were distorted or deformed. The father of Pompey was called "Gnaeus Pompeius Strabo, Pompeius Strabo". A native of Sicily so clear-si ...

xvi. p. 769; Steph. B. s. v. ). The city was renamed from Olbia to Arsinoe by

Ptolemy II Ptolemy II Philadelphus (, ''Ptolemaîos Philádelphos'', "Ptolemy, sibling-lover"; 309 – 28 January 246 BC) was the pharaoh of Ptolemaic Egypt from 284 to 246 BC. He was the son of Ptolemy I, the Macedonian Greek general of Alexander the G ...

in honor of

Arsinoe II of Egypt Arsinoë II (, 316 BC – between 270 and 268 BC) was Queen consort of Thrace, Anatolia, and Macedonia by her first and second marriage, to king Lysimachus and king Ptolemy Keraunos respectively, and then Queen of the Ptolemaic Kingdom of Egypt ...

, who was both his sister and wife. According to

Agatharchides Agatharchides or Agatharchus ( or , ''Agatharchos'') of Cnidus was a Greek historian and geographer (flourished 2nd century BC). Life Agatharchides is believed to have been born at Cnidus, hence his appellation. As Stanley M. Burstein notes, the ...

(de Rub. Mar. p. 53), there were hot springs in its neighborhood. The city stood nearly at the point where the limestone range of the Arabian hills joins the

Mons Porphyrites Mons Porphyrites (today Gebel Dokhan) is the mountainous site of a group of ancient quarries in the Red Sea Hills of the Eastern Desert in Egypt. Under the Roman Empire, they were the only known source of the purple "imperial" variety of porphyry. ...

, and at the southern entrance of the

Gulf of Suez The Gulf of Suez (; formerly , ', "Sea of Calm") is a gulf at the northern end of the Red Sea, to the west of the Sinai Peninsula. Situated to the east of the Sinai Peninsula is the smaller Gulf of Aqaba. The gulf was formed within a relative ...

(the Heroopolite Gulf).

References

{{coord missing, Egypt Populated coastal places in Egypt Former populated places in Egypt Ancient Greek geography of North Africa