Arguably the greatest Russian theologian of the early 20th century, Pavel Florensky (1882-1937) also did original work in such fields as liturgical aesthetics, iconographic theory, the philosophy of names, theoretical mathematics, and even electrical engineering. He became a Russian Orthodox priest in 1911, while remaining deeply involved with the cultural, artistic, and scientific developments of his time. Arrested by the Soviets in 1928, he returned to his scholarly activities until 1933, when he was sentenced to ten years of labor in Siberia. There he continued his scientific work and ministered to his fellow prisoners until his death four years later.