Döner Kebab isn’t even a Turkish specialty. In Turkey, Döner (referring to the meat that turns) is served on a plate with salad and bread. It’s not fast food like the German Döner Kebab, and it’s not meant to be taken to go.
Döner Kebab was invented in Germany by a Turkish immigrant whose traditional Döner didn’t fare well, because Germans were always in a hurry.
Or so the story goes that I heard in a documentary on German TV about 15 years ago.