The Dão River Valley has been producing wine since time immemorial, as demonstrated by the numerous “lagaretos” found there, which date back to the beginning of the Christian Era. The Dão Demarcated Region was officially recognised by royal decree in 1907, and the quality of its wines has gained international recognition. In this region, the sub-region of Silgueiros (where Quinta de Reis is located), with a sandy soil (granitic) and at an altitude of 360 to 440 metres, produces wines of excellence that are well known.