In the church of San Vitale in Ravenna, a mosaic from the middle of the sixth century shows Emperor Justinian standing with his court, a halo around his head and a golden bowl in his hands. Priests flank him on one side, soldiers on the other. The image says that power was meant to stand between heaven and earth, ordered by faith and sustained by merit. Yet the empire that Justinian ruled is gone, as every empire has gone. In the Kabbalistic tradition of the seventy-two angels, one name keeps watch over the question of what makes a kingdom last: Nithael, the angel of empires and legitimate success. Nithael is invoked by those who build something meant to endure: a house, a trade, a school, a reign. He is asked to protect it from decay and from the envy of rivals, and to let it flourish by merit rather than by trickery. The Fifty-Fourth Name The Shem HaMephorash, the "explicit name" of God, is a Kabbalistic teaching that draws seventy-two names of three letters from thre...