The Neolithic in Portugal

The Neolithic refers to the prehistoric period in which human communities ceased to depend exclusively on hunting, fishing, and gathering and began producing their own food through agriculture and animal domestication. This transformation — called neolithisation — was not a sudden or uniform event but a slow and regionally differentiated process that, in what is now Portugal, unfolded mainly between the mid-6th millennium and the end of the 4th millennium BC. More than a simple dietary change, it represented a new relationship with the land: territorial settlement, surplus accumulation, and the emergence of unprecedented forms of social and religious organisation.

The neolithisation of the territory

The first Neolithic manifestations in Portuguese territory date back to around 5500–5400 BC and appear in the coastal and limestone regions of the south-central area — Estremadura, the lower Tagus, and the western Algarve. Two models have been debated for decades to explain their arrival: maritime diffusion, with small groups of Mediterranean farmers settling along the coast, and the gradual adoption of new techniques by local populations. The presence of pottery decorated with shell impressions — the so-called Cardial pottery, marked with the cockle shell — links the early Portuguese Neolithic to the broader western Mediterranean horizon that spread from Liguria to the Atlantic.

During the same period, in the Tagus and Sado valleys, Mesolithic communities persisted, leaving behind the remarkable shell middens of Muge and Sado, vast accumulations of shells, food remains, and burials. Contact between these hunter-gatherers and the first farmers was, in some cases, prolonged: the full transition to the Neolithic in areas like Sines seems to have occurred only around 5000 BC. These contexts make Portuguese territory one of Europe’s richest laboratories for studying the transition from the Palaeolithic and Mesolithic to producer societies.

Neolithisation was not the replacement of one people by another but a slow reconfiguration of knowledge, practices, and beliefs — the first time entire communities decided to transform the landscape to remain in it.

Settlements, economy, and material culture

Neolithic communities lived in small settlements, often near fertile soils and watercourses. They cultivated cereals — wheat and barley — and legumes, and raised sheep, goats, cattle, and pigs. The material culture is distinguished by polished stone, particularly axes and adzes used for deforestation and woodworking, and by pottery that evolved from Cardial forms to smooth and incised types over time. Grinding stones for grain, ornamental beads, and flint industries that extended earlier traditions also emerged.

During the middle and late Neolithic, from around 4000 BC, settlement density increased, and occupation expanded inland. It is also during this phase that the landscape began to be shaped by enduring monuments, in an unprecedented act of territorial and symbolic assertion.

Monumentalisation and megalithic legacy

The most spectacular feature of the Portuguese Neolithic is the construction of large stone monuments. From the late 6th millennium BC, agro-pastoral communities erected dolmens, menhirs, and cromlechs, making the western peninsula one of the cradles of European megalithism. In the Alentejo, the Almendres Cromlech is among the oldest enclosures on the continent, a testament to a worldview that connected the dead, the sky, and the territory.

This monumentalisation would extend into the Chalcolithic, now with copper metallurgy and fortified settlements, but its roots are fully Neolithic. The study of this period, central to Portuguese archaeology, continues to redefine, with new dating and excavations, the antiquity and complexity of the first societies to durably transform the Iberian landscape.