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[[File:LegendaryNumbersMap.png|right|200px|thumb|From left to right: [[Number_ruins#Number_54.27s_Ruins_.28Colosseum.29|54's Ruins]], [[Number_ruins#Number_73.27s_.26_94.27s_Ruins_.22Labyrinth.22_.28Undersea_Ruins.29|73's & 94's Ruins]], [[Number_ruins#Number_46.27s_Ruins_.28Mountain_Palace.29|46's Ruins]], [[Number_ruins#Number_64.27s_Ruins|64's Ruins]], [[Number_ruins#Number_65.27s_Ruins_.28Castle.29|65's Ruins]] and [[Number_ruins#Number_44.27s_Ruins_.28Temple.29|44's Ruins]]
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'''Number ruins''' (ナンバーズの遺跡 ''Nanbāzu no Iseki'') are ruins where the [[Legendary numbersNumbers]] cards are sealed, guarded by [[Number's Guardian|its spirit]]s across the world in the ''[[Yu-Gi-Oh! ZEXAL]]'' anime. There were seven<ref name="ep99">{{episode|Yu-Gi-Oh! ZEXAL|99|ref}}</ref> different locations of different Number's Ruins shown on-board the [[Different Dimension Airship]].
Each set of ruins consist of deadly traps and inscribe a legend on its wall telling the story of the person who occupied that location in a previous era, before they became ruins due to the ravages of time. [[Kazuma Tsukumo]] had explored these ruins and left a "[[Conqueror's Coin]]" to mark his presence.