Duke Charles I of Savoy (1433-1490) was a prominent nobleman in the late Middle Ages. He ruled the Duchy of Savoy, which is located in present-day Italy and France. Charles was known for his efforts to expand his territory and strengthen his political influence in the region. During his reign, Charles I played a significant role in the Italian Wars, aligning with various powers to secure his interests. He was also involved in the development of Geneva, promoting trade and commerce. His legacy includes the establishment of a strong Savoyard state that would influence European politics for generations.