To understand the obsession with "Calle 1," we must travel back to the 19th century. In 1835, the City Council of Madrid attempted to rationalize the chaotic maze of medieval streets. Before this, streets were named after saints, events, or local shops (e.g., Calle de las Carretas – Street of the Carts).
18th-century, ridge-top palace for state occasions, plus tours with rooms full of art and antiques. calle 1 de madrid