Duke Amadeus IX was a member of the House of Savoy, born on February 1, 1435. He became the Duke of Savoy in 1465 and is known for his efforts to strengthen the duchy during a time of political instability. His reign was marked by attempts to expand territory and improve relations with neighboring states. Amadeus IX was also recognized for his piety and devotion to the Catholic Church. He was beatified in 1677, reflecting his reputation for holiness and charitable works. His legacy includes contributions to the cultural and political landscape of Northern Italy during the Renaissance.