[OkayPhysicist]

This is plainly false. Doner was being served in both sandwich and wrapped forms in Turkey well before the 70's. It was one of my grandfather's favorite foods growing up in Ankara in the 40's, and I've got family photos with street vendors selling it on the streets of Istanbul in the 60s.

It is true that in Turkey, you'll find the Döner Iskendar (cubes of bread, covered in döner meat, covered in sauce, on a plate) as a very common dish, but to claim that the street food variant was new in the 70's is insane. There are a ton of people alive today who can refute that, trivially.