It is admitted that the building (or rebuilding) of the Castle of Arouce dates back to 1080, when the village was peacefully occupied by Count Sesnando Davides, governor of the district of Conimbricense, whose mandate was given to him by Fernando Magno, sovereign who had conquered Coimbra from the Moors since 1064, bringing the Christian Reconquest from the Iberian Peninsula to the region of the Serra da Estrela and Lousã. Conquered by the Moors during the 1124 offensive, it was reoccupied and repaired by D. Teresa de Leão. With the independence of Portugal, it became part of the Mondego border line until 1147, when the conquest of Santarém and Lisbon by the forces of D. Afonso Henriques (1112-1185), who extended it to the Tagus. During this period, his wife, Queen D. Mafalda de Saboia, came to spend the summer with her court. In the Charter Charter that this sovereign granted to Miranda do Corvo (1136), he alludes to the Castle of Arouce, which would later receive its charter in 1151. Later, in 1160, a new document alludes to Lousã, distinct from Arouce, which demonstrates that the ancient Roman settlement was once again occupied with the pacification of the region, prospering in such a way that it received a charter in 1207, under the reign of D. Afonso II (1211-1223).