The Duchy of Pastrana is a historical title in Spain, established in the late 15th century. It was created for the House of Mendoza, a prominent noble family. The duchy is located in the province of Guadalajara, known for its rich cultural heritage and beautiful landscapes. Pastrana, the capital of the duchy, features notable architecture, including the Palace of Pastrana and the Monastery of San Francisco. The area is also famous for its connection to Princess of Éboli, a significant figure in Spanish history, who lived in the palace during the 16th century.