Catholic Encyclopedia: Raymond Lully
Biobibliographical article on Ramon Lull, who is called "Doctor Illuminatus."

Ramon Lull's Ars Magna
Lull may have been the first to use a mechanical device to generate logical proofs, an early logic machine of his own invention.

From the Middle Ages to Multimedia
A capsule summary of Thessa Lindof's Ph.D. dissertation on Ramon Llull's "Ars Magna" and its significance for present-day theories of communication.

Raymond Lull (1235?-1316)
His place in the history of science, particularly psychology and medicine. Rather flippant about religion and somewhat dismissive of Lull.

MacTutor History of Mathematics: Ramon Llull
Biography, major works, importance in mathematics.

Llull as Computer Scientist
Essay on the ways in which Ramon Llull was an unacknowledged pioneer in many principles of logic and mathematics which are nowadays taken for granted.

The "Good Upbringing" of Ramon Llull's Blanquerna
Although scholars sometimes eagerly look to Llull's "Book of Blanquerna" for information on elementary and secondary education in medieval Spain, it is at least as interesting for what it can tell us about Llull's cultural ideal.

Ramon Llull (1232-1316)
Illustrated biographical essay. Includes short bibliography.

Ramon Lull with the ladders of his Art
Color illustration. 14th-century miniature.

Raimond Lull
Description of a book in the collection of Dartmouth College, very brief biography of Lull, and a painted portrait.

Columbia Encyclopedia: Lull, Ramón
Short biographical entry.

The Birth of the Machine: Raymundus Lullus and His Invention
Synopsis of an address by Werner Künzel, in which he discusses Lullus's logic machine, its use and abuse by Athanasius Kircher, and its influence on Gottfried Wilhelm Leibniz.

Ramon Lull Chronology
A historical timeline of his life.

The Stoning of Philosopher Raymond Lull
Anonymous 15th-century Spanish depiction of Lull's martyrdom.

Raymund Lull, First Missionary to the Moslems
Full text of biographical book by Samuel M. Zwemer. Each chapter in its own file. Also available for download as a zip file.

Lullus, Reymundus (1235-1312)
Short biography, illustrated by early 16th-century woodcuts.

Ramón Lull
Long biographical essay.

What Was Llull Up To?
For the mathematically inclined.

The Natural Rhetoric of Ramon Llull
Article on Llull's concept of rhetoric, by Mark D. Johnston.

The Ecole Glossary: Ramon Llull
Biography of the Catalan mystic and missionary, by Karen Rae Keck.

Lully, Raymond
Short biography.

Knowledge Representation
The cover art for John Sowa's book is Ramon Lull's tree of nature and logic. It is reproduced here, along with Sowa's explanation.

Hebraica Veritas?: Ramón Llull
Two illustrations from an 18th-century edition of his works, linked to a short biography.