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The Anta do Monte Abraão was a 
Apart from the visit by Da Fonseca, Ribeiro’s findings attracted little interest in the dolmen until the 1960s, when archaeologists became concerned about the possible destruction of the Antas de Belas as a result of urban expansion and highway construction. In addition, the Anta do Monte Abrãao was threatened by the activity of a quarry located in its vicinity. The present condition of the stones is poor and extensive graffiti is visible.
megalithic
A megalith is a large Rock (geology), stone that has been used to construct a prehistoric structure or monument, either alone or together with other stones. More than 35,000 megalithic structures have been identified across Europe, ranging ...
dolmen
A dolmen, () or portal tomb, is a type of single-chamber Megalith#Tombs, megalithic tomb, usually consisting of two or more upright megaliths supporting a large flat horizontal capstone or "table". Most date from the Late Neolithic period (4000 ...
located in the parish of Monte Abraão, in Queluz, Sintra Municipality
Sintra (, ), officially the Town of Sintra (), is a town and municipality in the Lisboa Region, Greater Lisbon region of Portugal, located on the Portuguese Riviera. The population of the municipality in 2021 was 385,654, in an area of . Sintra ...
, Lisbon District
Lisbon District () is a district located along the western coast of Portugal. The district capital is the city of Lisbon, which is also the national capital. From its creation until 1926, it included the area of the current Setúbal District.
...
, Portugal
Portugal, officially the Portuguese Republic, is a country on the Iberian Peninsula in Southwestern Europe. Featuring Cabo da Roca, the westernmost point in continental Europe, Portugal borders Spain to its north and east, with which it share ...
. The dolmen was first identified in 1876, by Carlos Ribeiro, who carried out excavations until 1878 and published his results in 1880. Excavations suggest that it served as a tomb for about 80 individuals and that it dates back to the middle to end of the Neolithic
The Neolithic or New Stone Age (from Ancient Greek, Greek 'new' and 'stone') is an archaeological period, the final division of the Stone Age in Mesopotamia, Asia, Europe and Africa (c. 10,000 BCE to c. 2,000 BCE). It saw the Neolithic Revo ...
period (4000-2500 BC). The Anta do Monte Abraão and the nearby Anta da Pedra dos Mouros (also known as the Anta do Senhor da Serra) and Anta da Estria are collectively known as the Antas de Belas.
The burial chamber of the Anta do Monte Abraão had an east-west orientation. It had at least six upright limestone supporting stones or orthostats and three of these were found in situ by Ribeiro. The polygonal chamber had a diameter of 3.6 metres, approached by an 8 metre corridor that was 2 metres wide. Subsequent work by Vergílio Correia Pinto da Fonseca identified limited drawings on some stones. Despite the destruction of the tomb, excavations have yielded numerous finds, including stone axes, flint tools and blades, flint arrowheads, club heads, pottery ceramics, clay vessels and objects of adornment. These are exhibited at the Portuguese Geological Museum in Lisbon.
Apart from the visit by Da Fonseca, Ribeiro’s findings attracted little interest in the dolmen until the 1960s, when archaeologists became concerned about the possible destruction of the Antas de Belas as a result of urban expansion and highway construction. In addition, the Anta do Monte Abrãao was threatened by the activity of a quarry located in its vicinity. The present condition of the stones is poor and extensive graffiti is visible.
References
{{European Standing Stones Buildings and structures completed in the 4th millennium BC National monuments in Lisbon District Megalithic monuments in Portugal Prehistoric sites in Portugal Dolmens in Portugal 1876 archaeological discoveries Archaeological discoveries in Portugal