Britannica
Sources used in this answer
How old was Louis IX when he became king of France?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
Louis IX
Louis IX, carrying the hand of justice.
Louis IX was not yet 13 years old when he became king of France in 1226 following the death of his father, Louis VIII. Upon his accession, he ruled under the regency of his mother, Blanche of Castile.12