Were Ibn Khaldun and Sigismund, Holy Roman Emperor alive at the same time?
Yes. Ibn Khaldun and Sigismund, Holy Roman Emperor were alive at the same time for 37 or 38 years, from 1368 to 1405–1406.
Ibn Khaldun was 35 or 36 when Sigismund, Holy Roman Emperor was born.
Sigismund, Holy Roman Emperor was 37 or 38 when Ibn Khaldun died, aged 73 or 74.

Sigismund, Holy Roman Emperor
Holy Roman Emperor
Born 14 February 1368 · died 9 December 1437, aged 69
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Where Ibn Khaldun and Sigismund, Holy Roman Emperor were born
Birthplaces as a list
- Ibn Khaldun: Tunis
- Sigismund, Holy Roman Emperor: Free Imperial City of Nuremberg
- Geoffrey Chaucer: London
- Ibn Battuta: Tangier
- Petrarch: Arezzo
- Hafez: Shiraz
- Timur: Shahrisabz
- Joan of Arc: Domrémy-la-Pucelle
- Johannes Gutenberg: Mainz
