Consists of works, correspondence, documents, photographs, and memorabilia of Florovsky, reflecting his career at various academic institutions, such as Saint Vladimir's Theological Seminary in New York (1948-1956) and Harvard Divinity School (1956-1964), teaching patristics and Russian religious thought, and later at Princeton (1964-1972), teaching Slavic languages and literatures. The collection contains articles and papers written in several languages, mostly Russian and English, but also French, German, Rumanian, Italian, and Greek; card files; his notes and bibliographic references; and bibliographies of his writings. Much of the material concerns his work in the World Council of Churches, as a member of the Executive Committee and the Commission on Faith and Order. Correspondence pertains, among other things, to his involvement in the Fellowship of St. Alban and St. Sergius in London, the Parisian emigre community, and activities at Harvard. Correspondents include Svetlana Allilueva, Nikolai Arsenev, Nicholas Berdiaev, Father Sergius Bulgakov, Peter Struve, and George Vernadsky. In addition, there are several boxes of Florovsky family correspondence. Correspondence is largely in Russian, with occasional letters to Florovsky written in English, German, Greek, and French.