Prince Louis Charles de Bourbon (1751-1761) and Princess Marie Zepherine de Bourbon (1750-1755) were the children of Louis, Dauphin of France (1729-1765) and Maria Josepha of Saxony (1731-1767). Both children died young and the parents never recovered from their loss; the young prince, in particular, was idolized by both his parents and grandparents. Their maternal grandfather, Augustus III, stipulated that both of these busts should have blue eyes. See L. and Y. Adams, op. cit., p. 24 for a further discussion. Cf. Berling, op. cit., table 10, fig. 1 and 2 (the larger pair); and Butler, op. cit., pl. 232 for an example of the Prince in the Hermitage.