The Codex Sinaiticus is currently divided into four locations:

1. The majority of the manuscript is held at the British Library in London, England. The British Library acquired the bulk of the manuscript in 1933 from the Soviet government, which had confiscated it from the Soviet Union’s Eastern Orthodox monasteries during the early years of the Bolshevik Revolution.
2. Some leaves of the manuscript are held at the Leipzig University Library in Leipzig, Germany. These leaves were separated from the rest of the manuscript during the 19th century and were later acquired by the Leipzig University Library.
3. One leaf of the manuscript is held at the National Library of Russia in Saint Petersburg. This leaf was discovered in a binding of a 16th-century printed book in 1862 by the Russian scholar Constantin von Tischendorf, who also discovered the bulk of the manuscript at the Monastery of St. Catherine in Sinai, Egypt.
4. Two leaves of the manuscript are held at the Monastery of St. Catherine in Sinai, Egypt, where the manuscript was originally discovered in the mid-19th century.

Although the Codex Sinaiticus is divided into these four locations, scholars have been able to work collaboratively to produce a digital version of the manuscript that is available online for study and research purposes.