Constructions in Portugal (Almendres Cromlech, Évora) - Possibly first standing stones in Portugal. 5000 BC: Emergence of the Atlantic Neolithic period, the age of agriculture along the western shores of Europe during the sixth millennium BC pottery culture of La Almagra, Spain nearby, perhaps precedent from Africa. 4800 BC: Constructions in Brittany, France (Barnenez) and Poitou (Bougon). 4500 BC: Constructions in south Egypt (Nabta Playa). 4300 BC: Constructions in south Spain (Dolmen de Alberite, Cádiz). 4000 BC: Constructions in Brittany (Carnac), Portugal (Great Dolmen of Zambujeiro, Évora), France (central and southern), Corsica, Spain (Galicia), England and Wales, Constructions in Andalusia, Spain (Villa Martín, Cádiz), Construction in proto-Canaanite Israel c. 4000~3000 BC: Constructions in the rest of the proto-Canaanite Levant, e.g. Rujm el-Hiri and dolmens. 3700 BC: Constructions in Ireland (Knockiveagh and elsewhere). 3600 BC: Constructions in Malta (Skorba temples). 3600 BC: Constructions in England (Maumbury Rings and Godmanchester), and Malta (Ġgantija and Mnajdra temples). 3500 BC: Constructions in Spain (Málaga and Guadiana), Ireland (south-west), France (Arles and the north), Malta (and elsewhere in the Mediterranean), Belgium (north-east), and Germany (central and south-west). 3400 BC: Constructions in Sardinia (circular graves), Ireland (Newgrange), Netherlands (north-east), Germany (northern and central) Sweden and Denmark. 3300 BC: Constructions in France (Carnac stones) 3200 BC: Constructions in Malta (Ħaġar Qim and Tarxien). 3100 BC: Constructions in Russia (Dolmens of North Caucasus) 3000 BC: Constructions in Sardinia (earliest construction phase of the prehistoric altar of Monte d'Accoddi), France (Saumur, Dordogne, Languedoc, Biscay, and the Mediterranean coast), Spain (Los Millares), Sicily, Belgium (Ardennes), and Orkney, as well as the first henges (circular earthworks) in Britain. Chalcolithic 2500 BC: Constructions in Brittany (Le Menec, Kermario and elsewhere), Italy (Otranto), Sardinia, and Scotland (northeast), plus the climax of the megalithic Bell-beaker culture in Iberia, Germany, and the British Isles (stone circle at Stonehenge). With the bell-beakers, the Neolithic period gave way to the Chalcolithic, the age of copper. 2500 BC: Tombs at Algarve, Portugal. Additionally, a problematic dating (by optically stimulated luminescence) of Quinta da Queimada Menhir in western Algarve indicates "a very early period of megalithic activity in the Algarve, older than in the rest of Europe and in parallel, to some extent, with the famous Anatolian site of Göbekli Tepe" c. 2400 BC: The Bell-beaker culture was dominant in Britain, and hundreds of smaller stone circles were built in the British Isles at this time. Stone Age 2100