The Castro of Vila Nova de São Pedro is a Chalcolithic archaeological site in the civil parish of Vila Nova de São Pedro, municipality of Azambuja, in the Portuguese Estremadura area of Lezíria do Tejo. It is important for the discovery of thousands of arrowheads within its fortified settlement, associated with the Chalcolithic period of human settlement, and in particular with the long-lived fortified town, or castro, of Zambujal, near the municipality of Torres Vedras. This period of "urban" settlement lasted from 2600 to 1300 BCE, and during this time the Castro of Vila Nova was a contemporary of the southeastern Spanish settlements of Los Millares and El Argar.
Architecture
The rural site, is located on a small hilltop dominated by the ruins of a castle, and intersected in the north, east and west by the Ribeira de Alcoentre, Ribeira do Carrascal and Ribeira do Massuca (respectively).
VNSP I
thumb|[[Tholos do Barro]]
It has been determined that early inhabitants in this region began building fortifications around 2700 BCE, with the Dolmen of Herdade de Zambujal being the more central, with a very complex plan and up to six reconstructions in its lifetime. These cultures left behind many traces of their culture: stylized cups, crescents of clay, sticks of slate and the so-called plate-idols, that some archaeo-astronomers consider to be precise calendars. Nevertheless, the exchange with other groups, particularly Los Millares, is also present in the archaeological record. The inhabitants of the fort had its economy based on agriculture and grazing, which was suitable to the surrounding lowlands.