Eleanor of Viseu

DonaEleanor of Avis (Portuguese: Leonor de Avis; 2 May 1458 – 17 November 1525), also known as Leonor de Lencastre or Eleanor of Viseu (after her father's title, Duke of Viseu), was a Portugueseinfanta (princess) and queen consort of Portugal. She was the wife of King John II of Portugal and the sister of King Manuel I of Portugal. Eleanor is one of Portugal's more famous queen consorts and is best known as the founder of the Santa Casa da Misericórdia, a charitable organization operating since 1498.