Anta das Pedras Grandes
The Anta das Pedras Grandes (also called Dólmen das Pedras Grandes - German "large stones" ) is located south of Caneças and the A9 in the Estremadura in the Região de Lisboa in Portugal . Anta or dolmen is the Portuguese name for around 5000 megalithic structures that were built during the Neolithic in the west of the Iberian Peninsula by the successors of the cardial or imprint culture .
The Anta das Pedras Grandes was introduced to the public in 1880 by the geologist and archaeologist Carlos Ribeiro (1813-1882). It was built in the Neolithic (between 4500 and 2000 BC) and has been classified as a national monument since 1944. According to an excavation in 2001, it was originally a dolmen with a polygonal long chamber consisting of eight bearing stones (three of which have been preserved at their original height) and a short corridor (a remnant of a column on each side). The blocks of average size are made of limestone and basalt . There are traces of a tumulus . The monument is surrounded by flint debris.
Several dolmens were discovered in County Odivelas in the late 19th and early 20th centuries. The Trigache and Batalha dolmens were destroyed. The Anta das Pedras Grandes is the only one preserved in the area.
Nearby is the Carenque necropolis .
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Coordinates: 38 ° 48 '24.2 " N , 9 ° 13' 7.1" W.