(EN) Caroline P. Murphy, Murder of a Medici Princess, Oxford, Oxford University Press, 2008, p. 9.
«Alessandro, made Duke of Florence in 1531 by the Holy Roman Emperor Charles V, was Pope Clement VII's illegitimate son, whom he fathered when he was still Cardinal Giulio de' Medici. Alessandro's mother was a Moroccan slave girl, and portraits of him show he was unquestionably black.»
