Infanta Beatrice of Portugal was a Portuguese princess by birth and Duchess of Savoy by marriage to Charles III, Duke of Savoy. She was the ruling countess of Asti from 1531 to 1538.

Charles III of Savoy, often called Charles the Good, was Duke of Savoy from 1504 to 1553, although most of his lands were ruled by the French between 1536 and his death. Ruling for nearly 49 years, he is the third longest reigning Savoyard monarch, behind Charles Emmanuel I and Victor Amadeus II.