The document summarizes an international conference held at the British Library on July 6-7, 2009 about Codex Sinaiticus. Codex Sinaiticus is one of the most important biblical manuscripts in existence, containing the oldest complete copy of the New Testament in Greek from over 1600 years ago. The conference provided information on both the importance of Codex Sinaiticus for biblical and manuscript history and the history of the Holy Monastery of Sinai where it was originally held.