Infanta Isabella Clara Eugenia, Archduchess of Austria (1566-1633)

This 1595 portrait of Infanta Isabella Clara Eugenia at the National Trust predates by three years the Prado version from 1598, catching the infanta at an earlier moment in her life at her father Philip II's court. Born in 1566, Isabella Clara Eugenia was Philip II's eldest daughter from his third wife Elisabeth of Valois and remained his closest confidante and companion during the final decades of his reign. By 1595 she was twenty-nine, still unmarried — Philip had resisted matching her to various suitors — and was known as one of the most cultured and politically engaged women at the Spanish court. Pantoja's portrait from this year shows her in full court regalia, the painting functioning both as a record of her status and as potential diplomatic currency for marriage negotiations that Philip was beginning to consider more seriously. The National Trust holding suggests this version entered British or related collections through diplomatic channels.

The 1595 portrait shows Pantoja's style slightly earlier than the 1598 Prado version: the brushwork is comparably precise but the overall handling has a slightly less assured fluency, particularly in the spatial rendering of the ground plane. The infanta's face is carefully modelled, with the smooth finish Pantoja brought to royal complexions, while the costume passages demonstrate his characteristic obsession with textile differentiation.