[2] The Castro was first dug and reported in 1878 by Carlos Ribeiro, who presented his results to the Lisbon Academy of Sciences in what may be considered the first monograph dedicated to a pre-historical Portuguese settlement.

[3] During the second phase (lower Chalcolithic), thee lines of walls made of blocks of local limestone were rapidly built, covering a total of 11,000 square meters.

[1] During this phase, the caprine species become predominant due to a greater focus on secondary (i.e., non-meat) products such as wool and milk.

[3] There are also multiple ceramic findings from this phase, belonging to a specific style typical of the Estremadurean lower Chalcolithic.

[2] It is also in this phase that the use of copper metallurgy becomes widespread and researchers consider this to be the height of the Castro's economic activity.

[2] In the fourth phase the defensive structures are again reinforced and new, ellipsoidal houses are built, increasing the density of the constructions within the walls.