Ramon Llull was a 13th-century philosopher, writer, and missionary from Mallorca, a Mediterranean island. He is best known for his unique approach to combining faith and reason, using logic to explain and defend Christianity. Llull developed a system called the "Art," which aimed to help people understand complex ideas through simple symbols and diagrams. In addition to his philosophical work, Llull wrote numerous books in Catalan, Latin, and Arabic, covering topics like theology, poetry, and science. His efforts to promote interfaith dialogue and understanding between Christians and Muslims were groundbreaking for his time, making him a significant figure in the history of medieval philosophy.