This category is within the scope of WikiProject History, a collaborative effort to improve the coverage of the subject of History on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.HistoryWikipedia:WikiProject HistoryTemplate:WikiProject Historyhistory articles
This category is within the scope of WikiProject Journalism, a collaborative effort to improve the coverage of journalism on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.JournalismWikipedia:WikiProject JournalismTemplate:WikiProject JournalismJournalism articles
This category is within the scope of WikiProject Countries, a collaborative effort to improve the coverage of countries on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.CountriesWikipedia:WikiProject CountriesTemplate:WikiProject Countriescountry articles
The purpose of metacategories ("by" categories) is to divide the content of a category according to some property. A metacategory is not a distinct category from its parent, because it encompasses the same articles. A metacategory is simply a folder for organizing subcategories of the parent category, so it has no direct connection with other metacategories.
Metacategories should never be children of other metacategories. —Coder Dan (talk) 12:06, 1 August 2014 (UTC)[reply]