Codex Sinaiticus (01, א) alone has a complete text of the New Testament. It is dated to c. 330–360 C.E. The codex is an Alexandrian text-type manuscript written in uncial letters on parchment in the 4th century. Scholarship considers the Codex Sinaiticus to be one of the best Greek texts of the New Testament, along with the Codex Vaticanus.
KONSTANTIN VON TISCHENDORF: In Search of Ancient Bible Manuscripts
Friedrich Constantin von Tischendorf [1815-1874] Tischendorf was a world-leading biblical scholar who rejected higher criticism, which led to his noteworthy success in defending the authenticity of the Bible text.