Flag of the Province of Sulu, Philippines
Elements from https://archive.org/details/SymbolsOfTheStateRepublicOfThePhilippines/page/n269/mode/2up; and https://commons.wikimedia.org/wiki/File:Sulu_Flag.png; design from https://www.facebook.com/Province.of.Sulu/
Provincial Government of Sulu and the National Historical Commission of the Philippines