This Mühimme defteri no. E.12321 located in the Topkapi Palace Archives is the oldest known mühimme.

It consists of 231 folios and 557 fermans (imperial edicts) and includes hüküms (decrees) about all kinds of activities that took place in the Ottoman State between the years 951-952 A.H./1544-45 A.D. The present work contains a facsimile of the text its transcription into the Latin alphabet as well as an index of personal and place names and subjects.