Star of David as a Jewish Symbol on a Turkish Flag

The Star of David was used as a Jewish Symbol in the 16th century CE. It was drawn on the war flag of Chief Hizir Hayreddin (Barbarossa) along with the symbols of Christianity and Islam.
Chief Hizir Hayreddin (Barbarossa) was the Great Admiral of the navy of Suleiman the Magnificent from 1534 until his death on 1546. Now the flag is at the Naval Museum of Istanbul.

Picture is copied from Wikipedia