BAUMGARTEN-CRUSIUS, LUDWIG FRIEDRICH OTTO: German theologian; b. at Merseburg (56 m. s.s.e. of Magdeburg), Prussian Saxony, July 31,1788; d. at Jena May 31, 1843. He studied theology and philology at Leipsic and became university preacher there in 1810; in 1812 extra.ordinary professor of theology at Jena, ordinary professor, 1817. He gave lectures on all branches of so-called theoretic theology except church history, especially New Testament exegesis, Biblical theology, dogmatics, ethics, and history of doctrine. Gentle and sympathetic, and shrinking from theological strife, he was misunderstood in his time. His exegesis was painstaking, free from prejudice, and acute; as historian of dogma he understood the origin and development of religious ideas and doctrines as few others have done; and as systematic theologian he was profound and truly evangelical. His principal works were: Einleitung in das Studium der Dogmatik (Leipsic, 1820); Lehrbuch der christlichen Dogmengeschichte (Jena, 1832), Theologisch Auslegung der johanneischen Schriften (2 vols., Jena, 1843-45).