A court portrait of the Infanta Margarita (1651-1731) at the age of fifteen. She was the daughter of Felipe IV (1605-1665) and Mariana de Austria (1634-1696) and the future wife of Emperor Leopold of Austria (1640-1705).

The Infanta, who is also the central figure in Diego Velasquez's Las Meninas (P1174), poses in front of a velvet curtain wearing a sumptuous dress with pink and silver embroidery. She holds a handkerchief in her right hand and a rose in her left.

There has been considerable argument about who painted this work, whether it is by Diego Velasquez, de la Mazo, or perhaps a combination of both. It is currently considered one of Juan Bautista Martínez del Mazo's masterpieces, and its extraordinary quality is proof of this painter's mastery.