Designed by the prominent Italian architect Francesco Sabatini for Carlos III, this granite neoclassical gateway, comprising five arches topped by warrior angels and cupids, marked the eastern edge of the city up to the mid-1800s. Today it stands in the middle of the Plaza de Independencia roundabout, surrounded by a small flowery garden area, just opposite the entrance to the Retiro and next to the beginning of stylish Calle Serrano.