Kebab meat, consisiting of roast lamb and spices, had traditionally been served with rice but in a moment of inspiration Mr Aygun saw that the future lay in putting the meat inside a pitta bread.
That allowed customers who had been drinking to wander off into the night with their food and eat it as they stumbled home.
Mr Aygun once said: "I thought how much easier it would be if they could take their food with them."
The first of the new snacks was served on March 2, 1971, at Hasir, his restaurant in Berlin.
It was called a doner kebab after the Turkish word "dondurmek" which means a rotating roast.
Mr Aygun went on to invent the yoghurt sauce often served with a doner kebab