Bianca Lancia

Bianca Lancia (c. 1210–c. 1248) was an Italian noblewoman of the Lancia family of Piedmont, who spent much of her life at the family seat of Brolo. She became the mistress of Emperor Frederick II, probably meeting him in Sicily between 1226 and 1230, and bore him three children.

Constance married the Nicaean emperor John III Vatatzes in 1244; Manfred later became king of Sicily; and Violante wed Richard Sanseverino. Chroniclers record a deathbed marriage to Frederick around 1247, which legitimized Manfred but was never recognized by the Church.