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The office of vizier has been present in the bureaucratic organization of various states since ancient times. Entered into Islamic world during the period of Abbasid Caliphate, the office of vizier kept its presence in the bureaucratic organizations, but with slight differences, also in emirates like Samanid Empire and in Ghaznavids, which was emerged from Samanids. Arriving Khorasan region over Amu Darya in 1035 and establishing an independent empire after successful struggles against Ghaznavids until 1040, Seljuks also inspired by these states, adopted the office of vizier and maintained it in their organizational structure. Hence the reign of Toghrul-Beg ibn Mikail, the Sultan of Seljuk Empire (1040-1063), the office of vizier was present in the state organization, and totally six statesmen were assigned as the head of the office of vizier, with the title of vizier. They were Abu al-Kasm Sâlâr Bujkân, Abu'l-Fath Râzi, Ali ibn Abdullah Cuveyni, Nizam al-Mulk Abu Ahmed (Muhammad) Dehistani, Reisu’r-Ruesâ Abu Abdullah al-Huseyin (Hasan) ibn Ali ibn Mikâil and Amid al-Mulk Kunduri.

Viziers of the Seljuk Empire during the Reign of Toghrul-Beg ibn Mikail (1040-1063)