Margaret of Savoy was the last Habsburg Vicereine of Portugal from 1634 to 1640. In Portuguese she is known as Duquesa de Mântua, being by marriage the Duchess of Mantua and Montferrat. She was also regent of Montferrat during the minority of her daughter from 1612.

The Philippine dynasty, also known as the House of Habsburg in Portugal, was the third royal house of Portugal. It was named after the three Habsburg Spanish kings, all named Philip, who ruled Portugal between 1581 and 1640 under the Iberian Union, a dynastic union of the crowns of Spain and Portugal. The dynasty's kings were Philip I, Philip II and Philip III.