Its ruins are located north of the modern town Tekirova in the Kemer district of Antalya Province in Turkey.

So it began to lose importance, suffering further losses at the hands of Arab ships, until totally impoverished in the 11th century.

[5] Phaselis became a Christian bishopric, a suffragan of the metropolitan see of Mira, the capital of the Roman province of Lycia.

His successor, Aristodemus, was one of the signatories of the letter that in 458 the bishops of Lycia sent to Byzantine Emperor Leo I the Thracian concerning the murder of Proterius of Alexandria.

The bishop of the time of the Second Council of Nicaea (787) did not attend, and the acts were signed in his name by a deacon called Ioannes.

[6][7] No longer a residential bishopric, Phaselis is today listed by the Catholic Church as a titular see.