The dolmen is believed to have been made up of a polygonal chamber measuring 3.7 × 3.8 meters and formed by seven vertical stones (orthostats), together with an access corridor.

The artifacts collected, as well as more recent radiocarbon dating, suggest that the chamber was used in the late-Neolithic period between the middle and end of the 4th millennium BC.

In 1944, Georg and Vera Leisner drew up a new plan of the monument similar to that of Ribeiro but, in their case, assuming the existence of a significant tumulus.

In 1994 the Archaeological Museum of São Miguel de Odrinhas carried out a set of actions to safeguard the monument, including clearance of the area.

In 2017, at the initiative of Sintra City Council, work was carried out on the preservation and restoration of the monument and it was formally opened in April of that year.