Castle of Buitrago del Lozoya

The Castle of Buitrago del Lozoya (Spanish: "Castillo de Buitrago del Lozoya") is a castle located inside the walls of Buitrago del Lozoya, Community of Madrid region, Spain.
It was built in the 15th century in Gothic-Mudéjar style. It has a rectangular plan, with seven towers of various shapes (round, pentagonal, square), all in stone. The interior is in ruins.
It was declared "Bien de Interés Cultural" in 1931.