having become grand duke of tuscany upon his father's death, in 1670, cosimo iii, under the sway of his mother, vittoria della rovere, refused to grant marguerite louise entry to the privy council. thus without political influence, marguerite louise sorted the education of her eldest son, grand prince ferdinando. two more children followed: anna maria luisa, electress palatine, and gian gastone, the last medici grand duke of tuscany.