Crystarium may refer to:
- The character development system in Final Fantasy XIII and Final Fantasy XIII-2.
- The town from Final Fantasy XIV.
- The library at Akademeia in Final Fantasy Type-0.
The word Crystarium is a portmanteau of "crystal" and the suffix -arium, taken directly from the Latin. The arium suffix denotes both a place associated with a specific object, or a device associated with a specific function.
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