Infante dom Sancho I Martino “o Poblador” DE PORTUGAL
- Born: 11 Nov 1154, Coimbra, Portugal
- Married: 1175
- Died: 26 Mar 1212, Coimbra, Portugal
 Research Notes:
The De Rebus Hispaniæ of Rodericus Ximenes names "Sancium et Urracam…et aliam filiam…Tarasia" as the children of "Aldefonsum" & his wife. The Chronicon Lusitanum names “D. Martinus cognomento Sancius” as the only surviving son of “Rex Donnus Alfonsus” and his wife “Donnam Matildam, Comitis Amadæi de Moriana filiam”, specifying in a later passage that he was born “in nocte S. Martini”, hence his name, in 1192 (1154) when his father was 26 years old.
He succeeded his father in 1185 as SANCHO I “o Poblador” King of Portugal, and [of the Algarve]. “Sancius...Portugalensium Rex et uxor mea Dona Dulcia...cum filiis nostris Rege Domno Aldphonso et Rege Domno Petro et Rege Domno Fernando et filiabus nostris Regina Dona Therasia et Regina Domna Sancia” donated “paludem de Otta” to Alcobaça monastery by charter dated Mar “Era 1228” [1189 or 1190 if O.S.]. “Sancius...Portugalliæ et Algarb. Rex...cum uxore mea Regina D. Dulcia et filiis et filiabus meis” confirmed the privileges of the monastery of Grijó, for the love of “vassali nostri D. Alvari Martini qui...apud Sylvium interfectus est a Sarracenis”, by charter dated 27 Jul “Era 1228” [1190]. His reign was marked by institutional development, repopulation and founding of towns and the patronage of letters. The testament of “Sancius...Portugaliæ Rex”, dated Oct 1209, appointed “filius meus Rex Donnus Alphonsus” as his heir and bequeathed property to “filius meus Infans Donnus Petrus...Infans Donnus Fernandus...nepos meus Infans Donnus Fernandus...filiæ meæ Reginæ Donnæ Tharasiæ...Reginæ Donnæ Sanciæ...Reginæ Donna Maphalda...Reginæ Donnæ Blancæ...Reginæ Donnæ Bereng...Infanti Donnæ Dulciæ nepti meæ...Infanti D. S. nepti meæ...Donnæ Mariæ Pelagii et filiis meis quos de illa habeo...D. Egidio Sancii filio meo quem de illa habeo...Roderico Sancii...Tarasiæ...Constanciæ Sancii...filiis meis quos habeo de Donna Maria Arias...Donno Martino Sancii filii meo quem habeo de illa...et Urracæ Sancii”.
The Breve Chronicon Alcobacense records that "rex Sancius bonus" was buried "in monasterio Sancte Crucis cum Regina Dulcia de Aragona uxore sua". The De Rebus Hispaniæ of Rodericus Ximenes records that "Sancius" was buried "Monasterio S. Crucis iuxta patrem". 1
Marriage Information:
Sancho married Infanta doña Dulcia DE ARAGÓN, daughter of Ramón IV BÉRENGAR, Conde de Barcelona, and Infanta doña Petronila DE ARAGÓN, in 1175. (Infanta doña Dulcia DE ARAGÓN was born about 1160 in Barcelona, Aragón, Spain and died on 1 Sep 1198 in Coimbra, Portugal.)
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