Portrait of a Noblewoman, Probably Isabella of Portugal (1397–1472) 

The Portrait: The identities of the painter and sitter have long been debated, and while the painter remains uncertain, the noblewoman is now generally considered to be Isabella of Portugal (1397–1472), third wife of Philip the Good, Duke of Burgundy. As the daughter of King John I of Portugal, she was an attractive marriage candidate, but she was still unmarried at the ag...