Above the entrance of Las Puertas de Tierra is an escutcheon. The design features a pair of three-towered castles, two lion rampants and three fleurs-de-lys. This was the Lesser Royal Arms of Spain. It was adapted by Phillip V when he became the King of Spain in 1700. His coronation sparked the War of the Spanish Succession. This remained the coat of arms for the Spanish House of Bourbon until 1931.