Giovanni Battista Castiglione

Giovanni Battista Castiglione (1516–1598) was the Italian tutor to Princess (later Queen) Elizabeth I, appointed Groom of the Privy Chamber from 1559. It is speculated that he taught Prince (later King) Edward VI.

A humanist reformer, Castiglione was imprisoned in the Tower of London in 1556 by Princess Elizabeth's sister, Queen Mary, accused of sedition being so severely tortured that he was left permanently lame. Later, he carried Princess Elizabeth's letters from when she was imprisoned in the Tower.