Final answer:
Blanche of Castile became the regent in Burgundy when her husband, King Louis VIII, died, leaving the young heir Louis IX too young to rule. She successfully managed the kingdom amid rebellions until Louis IX took the throne.
Step-by-step explanation:
When discussing the regency in Burgundy during the period when the heir was too young to govern, Blanche of Castile stands out in history. After her husband King Louis VIII of France died in 1226, Blanche of Castile served as the regent for their young son, Louis IX, who later became one of the most famous kings of France. Amidst a series of challenges, including rebellions from the barons who sought to recover lands taken by her husband's father, Blanche of Castile demonstrated considerable political acumen. She not only successfully managed to protect the crown and the authority of her young son, but also established relative peace by the time Louis IX formally began his reign in