The monastery library preserves the second largest collection of early codices and manuscripts in the world, outnumbered only by the Vatican Library. It contains Greek, Arabic, Armenian, Hebrew, Georgian, and Syriac texts. The Codex Sinaiticus, now in the British Library, left the monastery in the 19th century for Russia, in circumstances that are now disputed.
St. Catherine's Monastery. The site contains the world's oldest continually operating library, possessing many unique books including the Syriac Sinaiticus and, until 1859, the Codex Sinaiticus. A small town with hotels and swimming pools, called Saint Katherine City, has grown around the monastery.