The Sigillum Dei, symbol of the living God !

The Sigillum Dei, Symbol of the living God!

Seal of God, or signum dei vivi, symbil of the living God, called by John Dee the Sigillum Dei Aemaeth was a late Middle Ages magical diagram, composed of 2 circles, a pentagram, and 3 heptagons. It is labeled with the name of God and his angels. It was an amulet with the magical functionthat, according to one of the oldest sources (Liber iuratus), allowed the initiated magician to have power over all creatures except Archangels, but usually only reserved for those who can achieve the blessed vision of God and angels.

Liber iuratus : 
Probably the oldest known description and image of the Sigillum Dei is in the 14th century.
The description of the seal in the Liber iuratus begins with the dimensions of  the circle surrounding the outside in the relation to common symbol figures of the Christian tradition.

Make first a circle whose diameter is 3 fingers, because of the 3 cross-nails of the Lord, or 5 fingers because of the 5 wounds of Christ, or 7 for the 7 sacraments, or 9 for the nine orders of angels, but usually 5 fingers will suffuce. Then make a second within this circle, let it be a distance from the first 2 grains because of the 2 Tablets of the Law of Moses, or 3 grains because of the persons of the Trinity.

The so created circular band will be at an apex of a small cross and from this starting point proceed from left to right 72 Latin letters, which vary in tradition. The sum forming the Shemhamephorasch, the ineffable name of God ("magnum nomen Domini Semenphoras licterarum 72"), showing a clear link to Jewish tradition.

Next to the circular band is a pentagram, which focuses on a Greek Tau, this is surrounded by the 5 letters of the name of God  "El" and "Ely", and 5 other pairs of letters (lx, al, a, c, to).

Inside the pentagon, in turn, is a heptagon drawn in such a way that its top side touches the center tip of the pentagram, and the pages of the heptagon should be labeled with the names of seven angels and archangels (Cafziel, Satquiel, Amael, Raphael, Anael, Michael, Gabriel).

The color of the seal of the Liber iuratus indicates that the pentagram is usually red, purple with yellow faces, the first heptagon blue, the second yellow, the third yellow and the circles are black. Also the area between the circles and the other surfaces were to turn green. In magical operations this would be handled differently.