Sancho I of Portugal (), nicknamed "the Populator" (), King of Portugal (Coimbra, 11 November 115426 March 1211) was the second but only surviving legitimate son and fifth child of Afonso I of Portugal by his wife, Maud of Savoy. Sancho succeeded his father and was crowned in Coimbra when he was 31 years old on 9 December 1185. He used the title King of Silves from 1189 until he lost the territory to Almohad control in 1191. Early life Sancho was baptized with the name Martin (Martinho) since he was born on the feast day of Saint Martin of Tours. On 15 August 1170, he was knighted by his father, King Afonso I, and from then on he became his second in command, both administratively and militarily. At this time, the independence of Portugal (declared in 1139) was not firmly established. The kings of León and Castile were trying to re-annex the country and the Roman Catholic Church was late in giving its blessing and approval. Due to this situation Afonso I had to search for allies within the Iberian Peninsula. Portugal made an alliance with the Crown of Aragon and together they fought Castile and León. To secure the agreement, Sancho married Dulce, younger sister of King Alfonso II of Aragon, in 1174. Aragon was thus the first Iberian kingdom to recognize the independence of Portugal. Reign With the death of Afonso I in 1185, Sancho I became the second king of Portugal. Coimbra was the centre of his kingdom; Sancho terminated the exhausting and generally pointless wars against his neighbours for control of the Galician borderlands. Instead, he turned all his attentions to the south. With the help of some soldiers on their way to join the Third Crusade, he sacked Alvor and took Silves in 1189, an event recounted in detail by an eyewitness in De itinere navali. Silves was an important city of the South, an administrative and commercial town with population estimates around 20,000 people. Sancho ordered the fortification of the city and built a castle which is today an important monument of Portuguese heritage. At the time he also styled himself "By the Grace of God, King of Portugal and Silves (Dei Gratiæ, Rex Portugalliæ et Silbis). However, military attention soon had to be turned again to the North, where León and Castile threatened again the Portuguese borders. Silves was again lost to