The first Castle of Guimarães (probably castle of wood, based on the rocks) is associated with the century. X and Countess Mamadona Dias, married to Count Hermenegildo Gonçalves. The castle would have been built to protect the monastery by it founded. From this primitive castle, there remains even today a few large stone rates (facing the field of S.Mamede) that served as the basis for the primitive castle.

This Portucalense County, is approximately 200 years, when the new advancement reality of the Almoravidas (Mulçuminums) for North obliges D.Fonso VI, to create the Kingdom of Galicia and offering it to a Franco d.raimundo Knight, for Sustain the Islamic advance to the north. D.Raimundo was unable to face this breakthrough, and at 1095 D.Fonso VI makes resurfacing the Portucalense County, delivering it to another Franco Knight, D. Herique de Burgundy. It is at the end of the XI century, which the castle suffers important changes to receive the new counts. It would even be still a castle probably from round stroke wall, and still without turrets, and only with two doors. It is in the century. XII with the death of the Conde D.Henrique in 1112, at the time of D.afonso Henriques, that this castle is expanded but still without turrets, nor tower tower. In 1179 the Pope recognizes the independence of the new kingdom of Portugal, whose capital was now in Coimbra. But it is only in the reign of D. Dinis, and later in 1385 during the fernandes battles with Castile that the castle is definitely improved and receives the tower and the tower tower, a clear gothic intervention in an initially Romanian castle.