This flag is fictitious, proposed, or locally used unofficially. It has not been adopted in an official capacity, and although it may be named as if it was an official flag of a geographical or other entity and have some visual elements that are similar to official logos or flags of that entity, it does not have any official recognition. A flag of this type should not be added to any articles or pages unless it is officially proposed by a government agency, covered by the media, or sees notable local use.
The factual accuracy of this flag is disputed. The sources are likely unreliable, the first is a blog containing several Turkic flags, several of them fictitious and unsourced. The second is an image on Flickr claiming to be the flag of the Ottoman Empire in 1517, lacking any source. The third is about the history of Hungary, also containing the flags of Hungary, this flag is used in the section about Ottoman rule, but lacks any source or caption about it. The fourth is a Facebook post about Ottoman flags since Osman I, it seems that its source is the blog previously mentioned. The fifth is a page about the flags of Cyprus, it is lacking any source.
خلاصہ
تفصیلFlag of Ottoman Empire (1517-1793).svg
English: Unofficial Flag of the Ottoman Empire (1517-1793)
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse
Public domainPublic domainfalsefalse
This work first published in the Ottoman Empire is now in the public domain because the Empire's copyright formalities were not met (copyright notice, registration, and deposit), or because the copyright term (30 years after the death of the author, sometimes less) expired before the Empire was dissolved (details).
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