The small residence was built in the late 18th century during the reign of his father, Charles III of Spain.

The Casita was built in an era when it was popular for nobles and royalty to have a small "hideaway" where they could entertain informally.

Villanueva also designed the Casita del Príncipe, the private residence of Gabriel's older brother Charles, Prince of Asturias.

Patrimonial Nacional, the state agency for Spanish royal sites, is responsible for managing the property, which is open to the public.

The couple, as well as the Infante Carlos, were buried at the Royal Monastery of San Lorenzo de El Escorial which can be seen from the Casita with beautiful views.