The crisis that arose as a result of the decline of the Abbasid caliphate in the middle of the seventh century AH for Sunni political thought continued for centuries. This crisis in the tenth century for a prominent thinker named Roozbehan Khonji. a prominent Sunni theorist. led to the attempt to revive the caliphate by appealing to the kings who held political power in his time. https://www.spidertattooz.com/Messerschmitt-Me262A-1A-Fighter-Aircraft-LT-Walter-Hagenah-III-Jagdeschwader-7-Larz-Airfield-Germany-1945-German-Luft/