Antonio Possevino
Antonio Possevino (1533–1611) was a Mantuan-born Jesuit and papal diplomat. He joined the Society of Jesus in 1559 and founded Jesuit schools in Savoy.
As envoy of Pope Gregory XIII from 1578, he led missions across northern and eastern Europe: he received King John III of Sweden into the Catholic Church and travelled to Moscow to negotiate with Ivan the Terrible.
Mediating between Ivan and Stephen Báthory of Poland, he secured the Truce of Jam Zapolski in 1582, ending the war between Russia and Poland-Lithuania. He later wrote an account of Russia and died in Ferrara in 1611.