Honorius of Thebes, a possibly mythical character from the Middle Ages, is said to have authored The Sworn Book of Honorius

The Sworn Book of Honorius

The Sworn Book of Honorius, or Liber Juratus is a medieval grimoire purportedly written by Honorius of Thebes. Its date of composition is uncertain, but it is mentioned as Liber Sacer in the 13th century, apparently asserting a high medieval date...

, although the first printed manuscript of this work did not appear until 1629. Considerable mystery still exists about the identity of Honorius, both Pope Honorius I

Pope Honorius I

Pope Honorius I was pope from 625 to 638.Honorius, according to the Liber Pontificalis, came from Campania and was the son of the consul Petronius. He became pope on October 27, 625, two days after the death of his predecessor, Boniface V...

 and Pope Honorius III

Pope Honorius III

Pope Honorius III , previously known as Cencio Savelli, was Pope from 1216 to 1227.-Early work:He was born in Rome as son of Aimerico...

 have been linked to the character. Honorius of Thebes is also claimed to be the creator of the Theban alphabet

Theban alphabet

The Theban alphabet is a writing system with unknown origins. It was first published in Johannes Trithemius' Polygraphia , in which it was attributed to Honorius of Thebes. Trithemius' student Agrippa attributed it to Pietro d'Abano...

, in Heinrich Cornelius Agrippa

Heinrich Cornelius Agrippa

Heinrich Cornelius Agrippa von Nettesheim was a German magician, occult writer, theologian, astrologer, and alchemist.-Life:Agrippa was born in Cologne in 1486...

's De Occulta Philosophia (1531) and Johannes Trithemius

Johannes Trithemius

Johannes Trithemius , born Johann Heidenberg, was a German abbot, lexicographer, historian, cryptographer, polymath and occultist who had an influence on later occultism. The name by which he is more commonly known is derived from his native town of Trittenheim on the Mosel in Germany.-Life:He...

's Polygraphia (1518).