Were Pope Gregory V and Avicenna alive at the same time?
Yes. Pope Gregory V and Avicenna were alive at the same time, from AD 977–983 to AD 999.

Pope Gregory V
Catholic priest who served as Pope
Born AD 972 · died 23 February AD 999, aged 26 or 27
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Where Pope Gregory V and Avicenna were born
Birthplaces as a list
- Avicenna: Afshona
- Ferdowsi: Tus
- Al-Biruni: Kath
- Ibn al-Haytham: Basra
- Leif Erikson: Eiríksstaðir
- William the Conqueror: Falaise
