When Giordano Bruno wrote On the Composition of Images, Signs and Ideas in 1591, he seemed to be one of the last magi of the Renaissance. The influence of Ficin and Agrippa is more than noticeable, with some of the images revealed being extremely close to those of his predecessors.

In accordance with the hermetic tradition, Bruno believed in the invocation of heavenly bodies, as did Hermes, followed by Ficin and then Agrippa. That is why he included the talismanic system, which he subsequently adapted to the art of mnemotechnics. The principle remained the same: inscribe the image of the planet to be invoked on the corresponding stone according to the following descriptions:
 
 
VENUS
A girl rising from the foam of the sea who is wiping the seawater from her slender hands as she approaches dry land. (…) As she walks, lilacs, roses and violets grow in her footsteps.
 
 
JUPPITER
From the southern area comes a king wearing an azure blue ceremonial robe similar to a brilliant sapphire; he wields an unsheathed sword and rides a stag that shakes it radiant gold antlers, branching out in all directions.
 
 
SOL
The image of the sun (called the eye of the world, the lamp, the attentive guardian father, the sower and servant) is an eye that looks in all directions, observing and enabling us to see everywhere as if we all had one head, one eyeball, one whole eye; a noble, material image of God that can see the past, present and future all at the same time. All around him and in every direction, he radiates light, heat and the semblance of peace.
 
 
TELLUS
She is presented as an enormous monster with eyes all over the place - that is why she is naked -, she is breathing flames of azure blue light verging on cobalt blue in its clarity, and she has eyebrows of blazing gold swirling around her eyes, with wonderfully brilliant eyes in the centre of their sockets.
 
 
 
MARS
A stocky-looking man is rising to his feet, his face bronzed and irascible, horrible to look at, judicious, severe, with a piercing look and fire in his eyes, smiling like a lion with its mouth open wide. (…). In his left hand, he is carrying an enormous sword that looks to be made of solid bronze with a rather stretched engraving of a dragon.
 
 
 
CUPIDO
An amazingly handsome boy in the eyes of God and all people. He is followed by the image of the Sun, the Earth, the Moon and another first-born - Gods, so to speak. In his hand, there are three keys - the first is iron, the second silver and the third gold.
 
 
 
SATURNUS
His skin is brown and he has a dangling beard, with long tufts of hair covering his eyebrows. His skin is wrinkled, his eyes appear to be blazing, he is wild and to look at him instils fear. (…) In his right hand, he is holding a stick, and in his left, olive and fig branches, as well as a vine shoot rich in grapes.
 
 
 
MINERVA
A young heroic-looking girl with two dragons entwined at her feet. She is holding a lance in her right hand. In her left, however, she is carrying a shield and wearing goat's armour across her throat and chest.
 
 
 
ASCLEPIUS
A bearded man knocked to the ground by a bolt of lightning. He is carrying a stick in his hand, and a boy is bringing him flowers as an offering; there is a cithara by his side.
 
 
LUNA
A ravishing young girl riding an ebony chariot mainly covered in silver leaf and bearing the image of a black ox and a white heifer.
 
 
APOLLO
He appears to be a most charming shepherd, carrying a stick and a purse (…) he is a bright young man with a beaming face, pressing the blood of mutilated birds, and then mixing it and offering the drink of the divination.
 
 
 
MERCURIUS
Next comes the visible form of the most energetic of all gods, the herald, the messenger, the judge. He is the effigy with half of his face black and the other half white; he is a young man with wings at his feet, wearing a hat and holding a wand in his right hand surrounded by two entwined snakes. He is presenting the crown of dead souls to Charon.