The written sources regarding the defensive works of Vaccean cities are scarce, limited to a few lines from antiquity and, above all, repeated surveys from the air conducted since the 1990s.
In the Classical sources, the reference by Appian (BC, I, 112) about a fire at the walls of Pallantia during Pompey's war against Sertorius in the 74 BC suggests that it was a wall built of mudbrick and tree trunks.
Aerial surveys of several Vaccean settlements were more detailed, outlining complex defense systems that included large walls and moats at sites such as Valoria la Buena, Palenzuela, El Teso de Cuestracastro in Mota del Marqués and Padilla de Duero.
The story of Pintia's city walls cannot be told without explaining another discovery, in 2000, about 150 meters from the wall.
In a spot known as Los Hoyos, where two roads intersect, archaeologists found a stone and mud wall around 4-5 meters wide. The structure, with a deep ditch running alongside it, facing the city, is thought to have been built during a siege of Las Quintanas, possibly during the Sertorian conflicts during the first quarter of the 1st century BC. This shows that we cannot overlook the areas around Las Quintanas, and the land between the Duero River and the Vega stream, which is a swampy area that is known locally as Las Navas, a name that reflects a flat area, possibly marshland.
A detailed study of the terrain showed that the Roman siege wall was located on the only viable road toward the city and, further on, toward the natural access that linked both sides of the Duero River and also the artisan neighborhood of Carralceña.