Per cognitionem visualem. The visualization of cognitive and natural processes in the Middle Ages. Acts of the XXV Annual Colloquium of the Société Internationale pour l'Étude de la Philosophie Médiévale, Porto, 14-15 and 21-22 June 2021

Visual representations were deeply involved in medieval traditions related to the dissemination and teaching of philosophy and science. Consequently, they were not only examples of theological or philosophical interpretation, but rather brought together manifold intellectual activities, illuminating various perceptual, cognitive, and spiritual concerns. Visual tools, which appear frequently in medieval manuscripts, have often been considered as "illustrative material" intended to facilitate the comprehension and interpretation of texts. These "visual aids" offer something more than a straightforward correspondence between a conceptual interpretation and its figurative depiction. They are, in fact, key to understanding the methods of acquiring and shaping knowledge through visual frameworks with didactical, disputational or heuristic purposes. The aim of this volume is to deepen our understanding of medieval visual tools that represented and demonstrated philosophical and scientific knowledge and, to an extent, the accumulation of empirical information. TABLE OF CONTENTS JOSÉ HIGUERA RUBIO. INTRODUCTION. THE MEDIEVAL DIAGRAMMATIC TURN ROBERTO HOFMEISTER PICH. DIALECTICS, VISUAL TOOLS AND METHODS OF LEARNING. EXPLORING VISUAL COGNITION IN MANUSCRIPTS ON LOGIC BY JESUIT MASTERS FROM ECUADOR (17TH-18TH CENTURIES) PIPPA SALONIUS. ORDO and Nature. The Trees of Sculpted Narrative at Orvieto Cathedral ALBERT SOLER. RAMON LLULL AND THE ARS DIAGRAMMATICA ARIANNA DALLA COSTA. LUNAR MANSIONS AS CELESTIAL IMAGES IN THE THRTEENTH-CENTURY DE SIGNIS ASTRONOMICIS ALESSANDRO PALAZZO. ET EGO QUIDEM NUNC FABRICABO CIRCULUM. IMAGES AND DIAGRAMS IN THE GEOMANTIC TREATISE ESTIMAVERUNT INDI MARIA MANUELA BRITO MARTINS. REPRÉSENTATIONS ET SCHÉMAS GRAPHIQUES DE LA SPECIES VISIBILIS DANS LE DE HOMINE D’ALBERT LE GRAND PETER JOHN HARTMAN. JOHN POUILLY AND JOHN BACONTHORPE ON REFLEX ACTS PAULA OLIVEIRA E SILVA – JOÃO REBALDE. THE DIAGRAM OF MINIMA NATURALIA IN MARCOS JORGE’S COMMENTARY ON ARISTOTLE’S PHYSICS (PHYSICA, I, 4) NICOLÁS VAUGHAN. OCKHAM AND WODEHAM ON PERCEPTUAL EXPERIENCE TAMAR TSOPURASHVILI. METAPHOR AS A SOURCE OF VISUALIZATION OF COGNITIVE PROCESS IN MEISTER ECKHART’S METAPHYSICS: THE EXAMPLE OF PREDIGT 9 LUCIANO MICALI. VISUAL PERCEPTION AND KNOWLEDGE OF GOD IN JEAN GERSON’S TRACTATUS DE OCULO YAEL BARASH. USING VISUAL CONVENTIONS TO DEPICT A VISIONARY EXPERIENCE:THE ILLUSTRATION OF VISION II OF HILDEGARD’S LIBER DIVINORUM OPERUM IN LUCCA CODEX FRANCESCA GALLI. THROUGH THE MIRROR. (SUPER-)NATURAL PROPERTIES OF REFLECTING SURFACES IN 13TH-CENTURY SCIENTIFIC AND THEOLOGICAL THOUGHT JOSÉ HIGUERA. THE VISUALIZATION OF MOTION AVERROES AND ALBERTUS MAGNUS BACK MATTER