The office is first attested in the early 1520s, and was in all likelihood a creation of Sultan
Suleyman the Magnificent (r. 1520–66), although it may have existed for far longer than that as a junior post attached to the government. As its name attests—
reis ül-küttab means as much as "head scribe" or "head clerk"—the post was in charge of the clerks of the
Imperial Council (
divan-ı hümayun), which formed the government of the
Ottoman Empire. Prior to Suleyman's reign, the functions of the office were shared by the
emin-i ahkam ("depository of the decisions") and the
nişancı ("chancellor"). Analogues existed however in other eastern Islamic states, as well as in Ottoman provinces, where a
divan efendi presided over the council of the local governors (
valis). According to J. Deny, the establishment of the
reis ül-küttab was the transfer of this practice to the capital. Its establishment coincided with the gradual increase of the number of clerks attached to the various senior offices and departments of state, which began under Suleyman and continued well into the 17th century; thus for instance the seven and eleven clerks attached respectively to the
defterdar ("treasurer") and the
nişancı, ca. 1530, had increased to nine and 25 respectively by 1561. The first occupant of the office was probably a certain Haydar Efendi, who died in 1523/4, but the first well-known incumbent was the historian
Celâlzâde Mustafa Çelebi, who held the post from 1524/5 until his promotion to
nişancı in 1534. In the 16th and 17th centuries, the
reis ül-küttab was drawn from the senior secretarial staff of the viziers or, more often, and from the early 17th century almost exclusively, the Grand Vizier. A regular line of promotion (
tarik) was established, whereby one advanced from ordinary secretary (Persian:
khalife, Turkish:
kalfa) in one of the bureaux of the Grand Vizier's secretariat to senior clerk (
ser-khalife or
baş-kalfa) and eventually to bureau chief (
mektubcı). The latter post entailed close proximity to the Grand Vizier and was a springboard for the highest offices. On rare occasions, the person chosen as
reis ül-küttab was not one of the Grand Vizier's
mektubcıs, but the secretary of the
Kahya Bey, the Grand Vizier's lieutenant. == Functions ==