International audienceThe use of words or powerful names is one of the invariants of the magical practice since the Antiquity. However, in the Middle Ages, their use, and in particular that of the divine names, holds a central place in the various rituals prescribed by the Latin texts of spiritual or ritual magic attributed to Solomon, whatever the origin (Hebraic, Arabic, Greek or Latin) they have. Revealed by God Himself a long time ago and transmitted by a long chain of authorities, these names are conceived as the best means, for the person who knows them and who deserves to use them, to take advantage of the unlimited power of God, which is absolutely necessary to force the evil spirits to obey the will of the magician and thus to inve...