María Inés Calderón (1605, in Madrid – 1678, in Guadalajara) also known as La Calderona and Marizápalos, was a Spanish actress, the mistress of Philip IV and the mother of his only recognized natural son, John of Austria the Younger.

There were rumors at the time that her son was fathered by Ramiro Pérez de Guzmán.

She retired to the monastery of San Juan Bautista of Valfermoso of the Nuns, in the Province of Guadalajara in the Utande Valley.

[1] The Sierra Calderona (Valencian: Serra Calderona) range at the Eastern end of the Iberian System was formerly known as Monts de Porta Coeli, after the Carthusian Monastery of Porta Coeli located in the mountains.

[2] The romanca "Marizapalos" by Gaspar Sanz, who taught the king's only recognized natural born son by Maria, tells the risque story of the niece of a priest who neglecting her studies picks flowers and accepts the love of a young man.