Septuagint means “70.”

The Catholic Church encoded 70 into their HQ, the Vatican (Vatican=70 *Francis=70).

70 is 56 in base-8 counting (Society of Jesus=56).

70 is the 50th composite number (Jesuits=50).

We know the 72 is very special as well (Jesuit Order=72). It goes with the 72 names of God in Kabbalah, and the 72 demons in the Goetia, as well as the 72 disciples sent out by Jesus in Luke.