Illuminatus of Arce

[2] In 1219, during the Fifth Crusade, he accompanied Francis on his mission to the court of al-Kāmil, sultan of Egypt.

[2] While earlier sources confirm that Francis had a companion in 1219, Bonaventure, in his Legenda maior (c. 1260), is the first to name him: "a brother named Illuminatus, a virtuous and enlightened man" (Illuminato nomine, viro utique luminis et virtutis).

[2][5] A letter appended to the Legenda trium sociorum names Illuminatus as a source.

Although this Legenda was written in the 1240s, the earliest manuscript dates to 1311 and the letter may be a later addition, perhaps influenced by Bonaventure.

[6] In the Divine Comedy of Dante Alighieri, Illuminatus is pictured in the Heaven of the Sun, among the teachers and mystics of the second garland of souls (Paradiso 12.130).