page_title: Joanna of Austria, Princess of Portugal
section_title: Life
hierarchical_section_title: Joanna of Austria, Princess of Portugal / Life
context_page_description: Joanna of Austria was Princess of Portugal by marriage to John Manuel, Prince of Portugal. She served as regent of Spain to her brother Philip II of Spain during his trip to England to marry Mary I in 1554-1556, and from 1556 to 1559. She was the mother of King Sebastian of Portugal.
caption: Joanna of Austria, Princess of Portugal; by Cristóvão de Morais, 1551.
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