The protasekretis or protoasekretis (Greek: ΟΟΟΟ[ΞΏ]Ξ±ΟΞ·ΞΊΟαΏΟΞΉΟ), Latinized as protasecretis or protoasecretis, was a senior official in the Byzantine bureaucracy. The title means "first asekretis", illustrating his position as the head of the order of the asekretis, the senior class of imperial notaries.
The post evolved gradually. The first asekretis are attested from the 6th century, and several Ecumenical Patriarchs of Constantinople and one emperor, Anastasios II (r.β713β715), were drawn from their ranks. Aside from possibly anachronistic references to Maximus the Confessor being a protasekretis under Emperor Heraclius (r.β610β641), the earliest confirmed occurrence (as proto a secreta) comes from the Liber Pontificalis for the year 756. As head of the imperial chancery (the effective successor of the late Roman primicerius notariorum), the position was highly influential: in the 899 Kletorologion of Philotheos, a list of court precedence of officials, he is placed seventh among the sekretikoi, the financial ministers of the state. From documents and sigillographic evidence, the holders of the office held the dignities of protospatharios, patrikios and anthypatos. Among others, the Patriarch Photios (858β867 and 877β886) held the post.