Robert I CAPET, Comte d' Artois
- Born: Sep 1216, Paris, Île-de-France, France
- Married: 14 Jun 1237, Compiègne, Oise, France
- Died: 8 Feb 1249/50, Al Mansurah, , Egypt
He was installed as Comte d'Artois 7 Jun 1237. Pope Gregory IX, having excommunicated and deposed Emperor Friedrich II, offered the imperial Crown to King Louis IX in 1239 for his brother Robert Comte d’Artois, but King Louis refused it on the latter’s behalf in 1240. Robert accompanied his brother on crusade 1249.
Betrothed (1235) to Infanta dona Maria de Portugal, daughter of Infante don Fernando de Portugal and his wife Jeanne Ctss of Flanders and Hainaut. After her father's death, Louis IX King of France demanded that she be sent to Paris for her education. The marriage contract between “J. comitissa Flandrie et Haonie…Mariam filiam nostram” and “Ludovicum regem Francie…Robertus frater ipsius domini regis” is dated Jun 1235.
Matthew Paris names him "Robertus comes Atrabatensis regis frater" when he records his death. The necrology of Sainte-Chapelle records the death "IV Id Feb" of "Robertis comitis Attrebatensis". 1
Robert married Mathilde DE BRABANT, daughter of Henri II 'The Courageous' DE BRABANT, Duc de Brabant, and Maria VON HOHENSTAUFEN, Princess of Germany, on 14 Jun 1237 in Compiègne, Oise, France. (Mathilde DE BRABANT was born about 1224 in Brabant, Antwerp, Beligium, died on 29 Sep 1288.)