Hatt-ı hümayuns sent to the grand vizier were handled and recorded at the
Âmedi Kalemi, the secretariat of the grand vizier. The Âmedi Kalemi organized and recorded all correspondence between the grand vizier and the Sultan, as well as any correspondence with foreign rulers and with Ottoman ambassadors. Other
hatt-ı hümayuns, not addressed to the grand vizier, were stored in other document stores (called
fon in the terminology of current Turkish archivists). These cut-out
hatt-ı hümayuns were not cross-referenced with the documents to which they referred and were only annotated by the palace office using general terms and an approximate date. Because Sultans were not in the habit of dating their
hatt-ı hümayuns until the late period of the empire, in most cases the documents associated with them are not known. Conversely, the decisions on many a memorandum, petition, or request submitted to the Sultan are unknown. The separation of
hatt-ı hümayuns from their documents is considered a great loss of information for researchers. The
Ottoman Archives in Istanbul has a special section of "cut-out
hatt-ı hümayuns". Most
hatt-ı hümayuns are stored at the BOA and in the
Topkapı Museum Archive. The BOA contains 58,000
hatt-ı hümayuns. Because the
hatt-ı hümayuns were originally not organized systematically, historians in the nineteenth and early twentieth century created several catalogs of
hatt-ı hümayuns based on different organizing principles. These historic catalogs are still in use by historians at the BOA:
Hatt-ı Hümâyûn Tasnifi is the catalog of the
hatt-ı hümayuns belonging to the Âmedi Kalemi. It consists of 31 volumes listing 62,312 documents, with their short summaries. This catalog lists documents from 1730 to 1839 but covers primarily those from the reigns of Selim III and Mahmud II within this period.
Ali Emiri Tasnifi is a chronological catalog of 181,239 documents organized according to the periods of sovereignty of Sultans, from the foundation of the Ottoman state to the Abdülmecid period. Along with
hatt-ı hümayuns, this catalog includes documents on foreign relations.
İbnülemin Tasnifi is a catalog created by a committee led by historian İbnülemin Mahmud Kemal. It covers the period of 1290–1873. Along with 329
hatt-ı hümayuns, it lists documents of various other types relating to palace correspondence, private correspondence, appointments, taxation, land grants (
timar and
zeamet), and charitable endowments (
vakıf).
Muallim Cevdet Tasnifi catalogs 216,572 documents in 34 volumes, organized by topics that include local governments, provincial administration, vakıf and internal security. == The
Hatt-ı Hümâyun of 1856 ==