The Emerald Tablet, also known as the Smaragdine Table, or Tabula Smaragdina, is a compact and cryptic piece of Hermetica reputed to contain the secret of the prima materia and its transmutation. It was highly regarded by European alchemists as the foundation of their art and its Hermetic tradition. The original source of the Emerald Tablet is unknown. Although Hermes Trismegistus is the author named in the text, its first known appearance is in a book written in Arabic between the sixth and eighth centuries. The text was first translated into Latin in the twelfth century. Numerous translations, interpretations and commentaries followed.