A line-by-line, material and textual case shows Codex Sinaiticus is a genuine fourth-century Bible, not a nineteenth-century forgery or Simonides hoax.
Codex Sinaiticus—Evidence-Based Dating to 330–360 C.E. Using Paleography, Stylistics, Ink, and Codicology
Codex Sinaiticus dates to 330–360 C.E., shown by fourth-century script, four-column layout, Eusebian apparatus, carbon ink main text, and early correction layers.

