Jorge Alarcão, who reproduced an exact plan of the property, cited the Romans as the original founders, but there were few vestiges to support the theory.

[1] In the 14th century cartulary of the Sé Cathedral of Évora, the primitive tower or castle already existed before the construct of the structure known as the Castelo Velho, located on the opposite bank of Ribeira da Valongo on the margins of Alcorovisca.

[1] In November 2004, a map of the sites risk of deterioration and report was elaborated by the DGEMN Direcção Geral dos Edifícios e Monumentos Nacionais (Directorate General for Buildings and National Monuments).

[1] The castle is located in a rural area, on an incline over a small platform over a gentle slope 200 metres (660 ft) isolated near the Ribeira de Valongo, an affluent of the Riberira do Degebe.

[1] The principal facade, marked by a large portico with arched doorway exposed to the east, with a keep tower located in the northeast and corbel in the southeast.