Maria of Portugal, Duchess of Viseu

Maria of Portugal, Duchess of Viseu was an Infanta of Portugal, the only daughter of King Manuel I of Portugal and Eleanor of Austria. A noted patron of the arts and buildings, Maria's personal wealth rivaled that of her half-brother, King John III of Portugal, making her the richest woman in Portugal and one of the wealthiest princesses in Europe.

18 June 1521

Born on the same birth day (18 June): Barbara Broccoli • Chris Harris Jr. • David T. Lykken • George Essex Evans • Jeanette MacDonald • Katharina Hobgarski • Keye Luke • Maxim Kovtun • Nathan Morris • Ray McKinley • Sandy Posey • Steve Murphy (news anchor) • Zoltán Halmay • Édouard Daladier • Édouard Le Roy • Éva Marton

Born in the same month (June 1521): John II, Duke of Schleswig-Holstein-Haderslev