Emmanuel Levinas (ˈlɛvɪnæs; ɛmanɥɛl levinas; 12 January 1906 – 25 December 1995) was a French philosopher of Lithuanian Jewish ancestry who is known for his work within Jewish philosophy, existentialism, and phenomenology, focusing on the relationship of ethics to metaphysics and ontology. Emanuelis Levinas (later adapted to French orthography as Emmanuel Levinas) was born in 1906 into a middle-class Litvak family in Kaunas, in present-day Lithuania, then Kovno district, at the Western edge of the Russian Empire. Because of the disruptions of World War I, the family moved to Charkow in Ukraine in 1916, where they stayed during the Russian revolutions of February and October 1917. In 1920 his family returned to the Republic of Lithuania. Levinas's early education was in secular, Russian-language schools in Kaunas and Charkow. Upon his family's return to the Republic of Lithuania, Levinas spent two years at a Jewish gymnasium before departing for France, where he commenced his university education. Levinas began his philosophical studies at the University of Strasbourg in 1923, and his lifelong friendship with the French philosopher Maurice Blanchot. In 1928, he went to the University of Freiburg for two semesters to study phenomenology under Edmund Husserl. At Freiburg he also met Martin Heidegger, whose philosophy greatly impressed him. Levinas would in the early 1930s be one of the first French intellectuals to draw attention to Heidegger and Husserl by translating, in 1931, Husserl's Cartesian Meditations (with the help of Gabrielle Peiffer and with advice from Alexandre Koyré) and by drawing on their ideas in his own philosophy, in works such as La théorie de l'intuition dans la phénoménologie de Husserl (The Theory of Intuition in Husserl's Phenomenology; his 1929/30 doctoral thesis), De l'Existence à l'Existant (From Existence to Existents; 1947), and En Découvrant l’Existence avec Husserl et Heidegger (Discovering Existence with Husserl and Heidegger; first edition, 1949, with additions, 1967).