Protopresbyter Thomas Hopko was for many years professor of dogmatic theology and dean of St. Vladimir's Seminary. He authored numerous works on all aspects of Orthodox faith and practice, and his writings have been translated into 15 languages. A world-renowned lecturer and podcaster, he also recorded countless CDs and audio-cassettes. He is regarded as one of the foremost Orthodox teachers of the twentieth century. He reposed on March 18, 2015.