The interaction between major philosophers of three Abrahamic religions in the medieval period. Maimonides as the representative of Jewish philosophers. Thomas Aquinas as the representative of Christian philosophers. Al-Farabi, Avicenna, Al-Ghazali and Averroes as the representatives of Muslim philosophers. Translation movement from Arabic to European languages. Theological subjects, philosophical approach. Epistemology, ontology, teleology, and eschatology. Major themes: Causality, God (existence, attributes and actions), world (seen an unseen), creation, soul, prophesy and revelation, resurrection, predestination and free will, theoretical and practical reason.