This architectural masterpiece built by the Romans in the second half of the first century AD or early second century, possibly during the reign of Emperor Claudius in Secovi today Segovia, to supply drinking water to this city of the VACE from the bed of the Frio River, located about 18 km, is the Roman aqueduct best preserved of the Empire.
Regarding the chronology of its construction there is no unified criteria, because for some historians, including Menendez Pidal, believe that his execution took place under Augustus, while others associated with the reign of Claudius, the second half of the century, and still others suggest the idea to include it in the works in Hispania by order of Emperor Trajan. It has a length of about 728 m. and a maximum height of 28.50 m., which must be added about 6 m. foundation in the main section. It consists of a double arches, formed by 119 the lower arches of a different light, depending on the stage and adaptations to the terrain profile, and the top of 44 arches, which form the core of the aqueduct.
From the aesthetic point of view the Romans created a particular aesthetic from the combination of the hollow wall. This partners hip creates an image, the foundation of aesthetics used in bridges and other structures of the empire, in which balance the arch and the lintel, the dynamic to static, the idea of massive, vain, light and dark as fruitful will be for the future.
The first great work of reconstruction must be done in times of Ferdinand and Isabella: the prior of the monastery of the Jeronimos del Parral, Don Pedro de Mesa, was in charge of managing the reconstruction between the years 1484 to 1489, when 36 rebuilt arcs with maximum respect for original work, although some bows have a slight tendency to form a pointed and less blunt styling that of Roman stones. In the sixteenth century are replaced in the niches of the central pillar statues of the patron saint of Segovia, the Virgin of Fuencisla, and San Sebastian. Currently, the state of deterioration of the stone by air pollution has been so alarming that the state, with the help of other national and international, had to protect it with a meticulous restoration process.