The role of the Vizier Nizam al-Mulk's family in the Great Seljuk Empire

One of the most important statesmen of the Great Seljuk Empire, the vizier Nızamal-Mulk's sons, grandsons and sons-in-law were brought to important positions in the state and had a great power both during his viziership and in the period after his death. Under the influence of this power, the members of the Nızamal-Mulk family took effective positive and negative roles in the important political events of the History of the Great Seljuk State by taking control of the vizier institution in order to maintain their current position and influence. In terms of revealing the important roles the Nizamal-Mulk Family members took in the History of the Great Seljuk Empire, the records obtained from historical sources are reflected in the study in a biographical manner. In these records, the focus is especially on the duties of the Nizamal-Mulk Family members in the Great Seljuk State and their relations with the Seljuk sultans. Keywords: Great Seljuk Viziers, Nızamal-Mulk, Izzal-Mulk, Mueyyidal-Mulk,-Fakral-Mulk, Ziyaal-Mulk, Semsal-Mulk, Ziyaal-Mulk.