Protective circle (Ingredient)

The Lesser Key of Solomon, Crowley/Mathers edition, 1904:

This is the Form of the Magical Circle of King Solomon, the which he made that he might preserve himself therein from the malice of these Evil Spirits. This Magical Circle is to be made 9 feet across, and the Divine Names are to be written around it, beginning at EHYEH, and ending at LEVANAH, Luna.