The Casita del Infante is a historic building in San Lorenzo de El Escorial, Spain, constructed as a private home for the Infante Gabriel of Spain, hence its name. The small residence was built during the late 18th century during the reign of his father Charles III of Spain. The Casita was built in an era where it was popular for nobles and Royalty to have a small "hideaway" to entertain informally; the most famous example of this is Marie Antoinette's Petit Trianon.