Princess D. Mafalda (1195-1256) was the daughter of King D. Sancho I and of D. Dulce de Aragão and granddaughter of King D. Afonso Henriques. Offered in marriage to
Henrique I of Castile, who would die two years later, she returns to Portugal to settle in the Monastery of Arouca. Her uncorrupted corpse remains there still.
The connection of Princess D. Mafalda to the region of the Tâmega and Sousa comes from the trust that King D. Sancho had in the Ribadouro family, putting the education of his legitimate daughter in the hands of Urraca Viegas, a daughter of Egas Moniz.
D. Sancho I
Sancho I (Coimbra, 11th November 1154 - Coimbra, 26th March 1211), was nicknamed o Povoador [the Populator], by the way he promoted the settlement of people in the territory, namely through the creation of the cities of Guarda (1199), Gouveia (1186), Covilhã (1186), Viseu (1187) e Bragança (1187), resorting to immigrants from Flanders and Burgundy.
Knighted by his father, King D. Afonso Henriques, he takes on the throne at 18 years of age, in 1172, after an accident which impaired the king during the Battle of Badajoz, in 1169.
He was the leader, while Prince, of an offensive military campaign in Andalusia (1178), that earned him the support of his father and of the Portuguese population. In a counter offensive, the Almohads made several incursions between 1179 and 1184, while the kingdom of Leon also resumed its hostilities against Portugal.
Proclaimed king on 9th December 1185, King D. Sancho takes advantage of the death of the king of Leon, the absence of the sultan of Morocco in Africa and the support of an army of Crusades to plan a new attack against the Almohads. Once the Algarve was conquered, he takes on the title of King of Portugal and of the Algarve.
The Portuguese king was responsible for the restoration of the finances of the Kingdom and the promotion of the culture in Portugal and abroad.
She was born around 1130, and was a daughter of Egas Moniz and Teresa Afonso, of the family of the Ribadouros. Patron of the Monastery of Saint Saviour of Tuías, in Marco de Canaveses, she was a maid of Princess D. Mafalda, daughter of King Sancho I and granddaughter of King Afonso Henriques, who raised her as his own daughter, leaving her, in 1199, a considerable portion of his property.