It is necessary to consider medieval Western Neoplatonism as a current of thought inserted in a wide cultural atmosphere where liturgical, theological, aesthetic, and artistic patterns play an important role as elements of a common historical past. In this article the author argues to what extent Neoplatonic concepts (Epiphany, Negative Theology, Theology of Light and Metaphor of Light) derived from Johannes Scotus Eriugena, translator of the Corpus Areopagiticum into latin, relate to the Iconography of Crist-Light or Maiestas domini in a (...) mandorle of light. Writings of various thinkers, paintings from the 12th century and medieval epigraphy are taken as primary sources in order to understand the relationship between Neoplatonism and Iconography in the European Middle Ages. (shrink)