Original: 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 Consulta ( Privy Council ) .
Simplified: 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 .