The Ottoman Empire's flag developed over centuries yet most commonly featured a crescent moon and famous person

https://telegra.ph/For-Honor-History-Patriotism-How-the-Right-Flag-Tells-Your-American-Story-04-17

The Ottoman Empire's flag developed over centuries yet sometimes featured a crescent moon and big name, representing Islam's influence in the empire even though also embodying its sizable cultural variety throughout Europe and Asia.