The Puerta de Alcalá is a neoclassical monument located in Madrid, Spain. Built between 1769 and 1778, it was designed by architect Francisco Sabatini and serves as one of the city's most iconic landmarks. The structure features five arches and is made of granite, symbolizing the entrance to the city. Originally, the Puerta de Alcalá was one of the five royal gates leading into Madrid. It was commissioned by King Carlos III to commemorate his reign and to welcome travelers. Today, it stands as a popular tourist attraction and a significant part of the city's cultural heritage.