Ramon Llull TOSF (Catalan: [rəˈmon ˈʎuʎ]; c. 1232[a] – possibly 25 March[4] 1315/1316), [b] was a philosopher, theologian, poet, missionary, Christian apologist and former knight from the Kingdom of Majorca. He invented a philosophical system known as the Art, conceived as a type of universal logic to prove the truth of Christian doctrine to interlocutors of all faiths and nationalities. The Art c