Keywords: Muḥtasib Early works to 1800 ; Markets Early works to 1800 State supervision ; Islam and state Early works to 1800 ; Economics Early works to 1800 Religious aspects ; Islam ; Islam and state ; Islam Economic aspects ; Economics Religious aspects ; Islam ; Muḥtasib ; Economics ; Religious aspects ; Islam ; Islam and state ; Markets ; State supervision ; Muḥtasib ; Islamic Empire ; Early works ; Ḥisba ; Ibn-Taimīya, Aḥmad Ibn-ʿAbd-al-Ḥalīm 1263-1328 ; Volkswirtschaft ; Religionspolitik ; Markt ; Staatsaufsicht ; Muḥtasib ; Kalifenreich ; Islamisches Recht