The Christian Walls of Madrid, also known as Medieval Walls, were built in the Spanish city of Madrid between the 11th and 12th centuries, once the city passed to the Crown of Castile.
They were built as an extension of the original walled enclosure (9th century), of Muslim origin, to accommodate the new districts which emerged after the Reconquista. With the establishment of the Court in 1561, it fell into disuse, demolished almost entirely.
Still standing are some remains integrated into the structure of various buildings of El Madrid de los Austrias, a name designating the Habsburgs's historic center of the city.
The most important are in the calles (streets) of los Mancebos, of Don Pedro, of del Almendro, of Escalinata, of del Espejo, of de Mesón de Paños and of the Cava Baja and as in Plaza de Isabel II and in the underground parking of the Plaza de Oriente. The remains that are still standing were declared a Historical and Artistic Monument in 1954.