Neoplatonism (especially Iamblichus and Proclus: their metaphysics, ontology and aesthetics). Theurgy: origins and meaning Relationship between Hellenic and Near Eastern (especially Egyptian and Arabic) cultures. Neoplatonism and Sufism. Hermeneutics and theory of symbols. The theme of my thesis (accomplished in 2000): "Hermeneutical Philosophy of Proclus" (in Lithuanian) Monograph: "Labyrinth of Sources. Hermeneutical Philosophy and Mystagogy of Proclus", Eugrimas: Vilnius, 2002 (in Lithuanian)