| Galla Placidia | |
|---|---|
| Augusta | |
 Tremissis of Galla Placidia | |
| Roman empress | |
| Tenure | 421 |
| Born | 392/93 |
| Died | 27 November 450 (aged 57–58) |
| Burial | |
| Spouse | Ataulf Constantius III |
| Issue |
|
| Dynasty | Theodosian and Valentinianic |
| Father | Theodosius I |
| Mother | Galla |
| Religion | Nicene Christianity |
Galla Placidia (392/93 – 27 November 450), daughter of the Roman emperor Theodosius I, was a mother, tutor, and advisor to emperor Valentinian III. She was queen consort to Ataulf, King of the Visigoths from 414 until his death in 415, briefly empress consort to Constantius III in 421, and managed the government administration as a regent during the early reign of Valentinian III until her death.