La Porta Alchemy is the only survivor of the five gates of the villa Palombara lost on the arc of the door on the opposite side there was an inscription that can date it to 1680, there were also lost four other inscriptions on the walls of the building within the villa. According to legend, handed down in 1802 by the abbot and scholar Girolamo Francesco Cancellieri, a pilgrim stibeum was housed in the villa for a night.
The "pilgrim", identified with the alchemist Francesco Giustiniani Bono, stayed for a night in the gardens in search of a mysterious grass capable of producing gold, the next morning he was seen to disappear for ever through the door, but left behind some gold particles result of a successful alchemical transmutation, and a mysterious card full of puzzles and magic symbols that would contain the secret of the Philosopher's Stone.
The Marquis had engraved on the five gates of the villa and on the walls of the mansion, the content of the manuscript with symbols and enigmas, in the hope that one day someone would be able to decipher them. Perhaps the enigmatic paper may refer to historical and geographical concordance, and to pass through the hands of some members of the club's alchemical Palombara villa, the mysterious Voynich manuscript, which was part of a collection of alchemical texts that belonged to King Rudolph II of Bohemia Christina of Sweden and donated by his bookseller Isaac Vossius, and fell into the hands of the scholar Athanasius Kircher, a teacher in the school's Jesuit Borri.
The alchemical symbols carved on the door can be traced between the illustrations of the books of alchemy and esoteric philosophy that circulated in the second half of the seventeenth century, and who presumably were in possession of the Marquis Palombara. In particular, the design on the front door of Alchemy, with the two overlapping triangles and inscriptions in Latin, appears almost exactly the same on the title of the book allegorical / alchemical Aureum Seculum Redivivum of Henricus Madatanus ..

On the pediment of the door is the alchemical seal of Solomon circumscribed by a circle with inscriptions in Latin, with the upper tip occupied by a cross attached to an inner circle and the bottom tip of the hexagram occupied by an oculus: the alchemical symbol of the sun and gold.
The frieze is a symbol of the sect of Rosicrucians represented in many texts of the seventeenth century, perhaps for the first time appears on the title of the book 'Aureum Seculum Redivivum'. The triangle with the oculus is very similar to a similar symbol of a pyramid with the tip of the eye, which appears on the U.S. one-dollar bills, among other things, accompanied by an inscription in Latin Novus Ordo seclorum reminiscent of the inscription on the pediment Aureum Seculum Redivivum.

The alchemical symbols along the jambs of the door following the sequence of the planets associated with the corresponding metals: lead-Saturn, Jupiter-tin, iron-Mars, Venus-copper-silver Moon, Mercury, Mercury, Sun-gold. For each planet is assigned a motto sealed, following the path upwards to the right, to drop down to the left, under the direction of the motto in Hebrew Ruach Elohim. The door should then read as a historical monument that marks the passage of the overthrow of the symbols of Christianity to the new spiritual model that was developing in the seventeenth century.

of Giorgia Mancini