Lobegott Friedrich Constantin (von) Tischendorf (January 18, 1815 – December 7, 1874) was a noted German Biblical scholar. He deciphered the Codex Ephraemi Rescriptus, a 5th-century Greek manuscript of the New Testament, in the 1840s, and rediscovered the Codex Sinaiticus, a 4th-century New Testament manuscript, in 1859.