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Librarium Omnissiah
From Warhammer 40k - Lexicanum
The Librarium Omnissiah is a large repository of knowledge used by the Adeptus Mechanicus and is located on their home planet of Mars. Within it are large mile-long logic stacks that contain records of thousands of mysteries of the universe and rivals that of the archive-catacombs of the Adeptus Terra.[1]
Source
- 1: Codex: Necrons (3rd Edition), pg. 6