Isabella Clara Eugenia, infanta of Spain (b. 1566)
Isabella Clara Eugenia (Spanish: Isabel Clara Eugenia; 12 August 1566 – 1 December 1633), sometimes referred to as Clara Isabella Eugenia, was sovereign of the Spanish Netherlands in the Low Countries and the north of modern France with her husband, Archduke Albert VII of Austria.

Their reign is considered the Golden Age of the Spanish Netherlands. Isabella was one of the most powerful women in 16th- and 17th-century Europe.