sentences:  So far about 450 tablets and tens of thousands of fragments have already been returned to Iran in total.The narrow content of the Persepolis Fortification Archive, recording only the Achaemenid administration’s transactions dealing with foodstuff, must be taken into consideration in regards to the amount of information that can be deduced from them.Excavations directed by Ernst Herzfeld at Persepolis between 1933 and 1934 for the Oriental Institute, discovered tens of thousands of unbaked clay tablets, badly broken fragments and bullae in March 1933.