Were Pope Gelasius I and Valentinian III alive at the same time?
Yes. Pope Gelasius I and Valentinian III were alive at the same time for 35 years, from AD 419 to AD 455.
Pope Gelasius I was 8 or 9 when Valentinian III was born.
Pope Gelasius I was 44 or 45 when Valentinian III died, aged 35.

Pope Gelasius I
Catholic priest who served as Pope
Born AD 410 · died 19 November AD 496, aged 85 or 86
- Jerome, c. AD 345 – c. AD 420
- Augustine of Hippo, AD 354 – AD 430
- Hypatia, c. AD 360 – AD 415
- Pope Leo I, c. AD 394 – AD 461
- Pope Gelasius I, AD 410 – AD 496
- Valentinian III, AD 419 – AD 455
- Pope Hormisdas, AD 450 – AD 523
- Theodoric the Great, AD 454 – AD 526
- Aryabhata, AD 476 – AD 550
- Justinian I, AD 482 – AD 565
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Where Pope Gelasius I and Valentinian III were born
Birthplaces as a list
- Pope Gelasius I: Africa
- Valentinian III: Ravenna
- Augustine of Hippo: Thagaste
- Justinian I: Tauresium
- Hypatia: Alexandria
- Jerome: Dalmatia
- Aryabhata: Pataliputra
- Pope Leo I: Tuscany
- Theodoric the Great: Carnuntum
- Pope Hormisdas: Frosinone
