Francis I of France was a king who ruled from 1515 to 1547. He is known for his efforts to strengthen the French monarchy and expand its territories. Francis I was a patron of the arts, supporting artists like Leonardo da Vinci and promoting the Renaissance in France. During his reign, Francis I engaged in several wars against Charles V, the Holy Roman Emperor, to assert French power in Europe. He also established the French language as the official language of the court, which helped to unify the nation and promote French culture.