Background
Constance was a paternal great-granddaughter of King Ferdinand I of Castile.
Constance was a paternal great-granddaughter of King Ferdinand I of Castile.
While still a child she became the first wife of future King Alfonso XI of Castile (1311-1350), also a child at the time, in Valladolid. The marriage was annulled in 1327. Constance was a Castilian noblewoman, whose exact date of birth is unknown, occurring sometime between 1315 and 1323.
Constance was imprisoned in a castle in Toro while her father waged war against Alfonso XI until 1329.
Eventually, the two reached a peaceful accord after mediation by Juan del Campo, Bishop of Oviedo. This secured Constance"s release from prison.