The Sigillum Dei (seal of God, or signum dei vivi, symbol of the living God, called by John Dee the Sigillum Dei Aemaeth) was a late Middle Ages magical diagram, composed of two circles, a pentagram, and three heptagons, and is labeled with the name of God and his angels. It was an amulet (amuletum) with the magical function that, according to one of the oldest sources (Liber iuratus), allowed the initiated magician to have power over all creatures except Archangels.
