# Black cube

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> Source: https://en.wikipedia.org/wiki/Black_cube
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'''Black cube''' may refer to:
* [Black Cube](/source/Black_Cube), a private intelligence agency
* [Black Cube Nomadic Art Museum](/source/Black_Cube_Nomadic_Art_Museum), a nonprofit contemporary art organization producing site-specific art in the public realm.
* [Blackballing](/source/Blackballing), a vote of rejection in a secret ballot
* The [Kaaba](/source/Kaaba), a black cubical building at the center of the Grand Mosque of Mecca; it is the most sacred site in Islam
* [Tefillin](/source/Tefillin), a small black leather cube used by Jews during prayer

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Adapted from the Wikipedia article [Black cube](https://en.wikipedia.org/wiki/Black_cube) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Black_cube?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.