The kanikleios (Greek: κανίκλειος), more formally chartoularios tou kanikleiou or epi tou kanikleiou (Greek: [χαρτουλάριος] ἐπὶ τοῦ κανικλείου) was one of the most senior offices in the Byzantine imperial chancery.[1] Its holder was the keeper of the imperial inkstand, the kanikleion, which was shaped as a little dog (Latin: canicula) and contained the scarlet ink with which the Byzantine emperor signed state documents. The office first appears in the 9th century, and was usually held in tandem with other government offices.[2] In the Kletorologion of 899 it is ranked among the "special dignities" (ἀξίαι εἰδικαί, axiai eidikai), following the synkellos and preceding the protostrator.[2] In the overall order of precedence, he ranked behind the chartoularios tou vestiariou and before the protostrator, and is recorded as usually holding the rank of protospatharios.[3]
In Constantinople, there also was a quarter on the shore of the Golden Horn named ta Kanikleiou, which took its name from the palatial residence built there by Theoktistos.[7]