The Catholic Church considered him immoral and a lover of heretical writings and he found himself put on trial by the Inquisition.
Incidentally, while he was at Heidelberg, his quarrels with compatriot Scipione Gentili ultimately compelled the latter to leave for Altdorf.
[citation needed] At the University of Montpellier, where he was from 1600 to 1616, Nicolas Claude Fabri de Peiresc was his pupil.
This work is seen as exceptional among its contemporaries as it does not digress into alchemy, cabalism, or magic, and in fact stays true to Llull's traditional interests.
This controversy in early international law lined him up with Paolo Sarpi, against Juan Bautista Valenzuela Velázquez and Lorenzo Motino.