The Persian-Parthian bilingual inscription from Paikuli (Iraq) which dates back to the reign of Great King Naresh (293-303) was first published by Ernst Herzfeld in 1924. Inspite its fragmentary state of preservation it is the most important evidence we have on the internal political practices of the Sassanian period. The first volume of the new edition presented by the authors contains in particular Herzfeld's photos, squeezes and facsimiles of his still unpublished new discoveries of 1923. It includes those photos by Volker Popp (1971) and drawings by Sir Henry Rawlinson (1844) which continue to be of relevance.Volume 2 will contain a synoptic reconstruction of the Persian and Parthian versions, Volume 3 the translation and commentay by P. O. Skjaervo.