Ahmad ibn Umar ibn Alī, known as Nizamī-i Arūzī-i Samarqandī (Persian: نظامی عروضی) and also Arudi ("The Prosodist"), was a Persianpoet and prose writer who flourished between 1110 and 1161 AD. He is particularly famous for his Chahar Maghaleh ("Four Discourses"), his only work to fully survive. While living in Samarqand, Abu’l-Rajaʾ Ahmad b. ʿAbd-Al-Ṣamad, a dehqan in Transoxiana, told Nezami of how the poet Rudaki was given compensation for his poem extolling the virtues of Samanid AmirNasr b. Ahmad.
Born in Samarqand, Aruzi spent most of his time in Khorasan and Transoxiana. He served as a court-poet to the Ghaznavids for many years. All that is known of his personal life is gleaned from the Chahar Maqala itself. While he was primarily a courtier, he also noted in his book that he was an astronomer and physician as well. He reports in the work that he spent time not only in his native Samarqand, but also in Herat, Tus (where he visited Ferdowsi's tomb and gathered material on the great poet) Balkh, and Nishapur, where he lived for perhaps five years. He also claimed to have studied under the astronomer-poet Omar Khayyám, a native of Nishapour.
In the Introduction to the Chahar Maqala, Nizami Aruzi elaborates on issues of natural science, epistemology and politics. He is a champion of the ancient Persian concept of kingship which, for the sake of legitimation, is expressed in Muslim vocabulary. His elaboration on the classes of society is influenced by Persian as well as Greek conceptions, especially Plato.