Arcadia (Greek: Άρκαδία; 3 April 400 – 444) was the third daughter of the Roman emperor Arcadius (r. 383–408) and Aelia Eudoxia and a member of the Theodosian dynasty.
Following the example of her older sister Aelia Pulcheria she took a vow of virginity, but unlike her, she never married, devoting herself to religion.
[1] In Constantinople, she ordered the construction, near the Gate of Saturninus,[2] of a monastery dedicated to Saint Andrew.
The building, named also Rodophylion (Ancient Greek: Ροδοφύλιον) lay about 600 m. west of the gate.
[3] Heavily transformed, the church of the monastery is now the Koca Mustafa Pasha Mosque of Istanbul.