In Portugal, these barrows are called "mamoa", from the Latin "mammula", given to them by the Romans because of their shape, similar to the breast of a woman ("mama" in Portuguese). Near Cividade de Terroso there's the most relevant one, the "Mamoa de Sejães". This tumuli is located near the hamlet of Sejães, in the eastern hill slope. Given the fact that no archaeological surveys were made until the present day, nothing is known about the structure of the monument, and after thousands of years it is still unbroken.