Anta da Pedra dos Mouros (meaning: Stone of the Moors), also known as Anta do Senhor da Serra (meaning Lord of the mountains), is a megalithic dolmen located near Belas and Queluz, in the district of Lisbon in Portugal.
It is believed that Anta da Pedra dos Mouros dates back to the late Neolithic and early Chalcolithic times (4000-2500 BCE). Anta da Pedra dos Mouros, Anta da Estria and the Anta do Monte Abraão are within walking distance of each other and are known collectively as Antas de Belas.
Anta da Pedra dos Mouros was first identified in the 1850s by Carlos Ribeiro. Despite being registered and protected as a national monument in 1910, the dolmen has suffered significant damage in recent years.