The 5th day of Esfand, the twelfth month on the Iranian calendar, which fell on February 23 this year, is commemorated as Engineer’s Day in Iran in the memory of Nasir al-Din Tusi, the most celebrated scholar of the 13th century.

Iran PressIran news: Tusi was born in Tus in 1201 and died in Baghdad in 1274. Very little is known about his childhood and early education, apart from what he writes in his autobiography, "Contemplation and Action" (Sayr wa suluk).

As a young boy, Nasir al-Din was encouraged by his father to study all “the branches of knowledge and to listen to the opinions of the followers of various sects and doctrines,” as such, Tusi traveled widely to study with teachers of his choice.

At the age of twenty-two or a while later, Tusi joined the court of Nasir al-Din Muhtashim, the Ismaili governor of Quhistan, Northeast Iran, where he was accepted into the Ismaili community as a novice.

Among the major events of Tusi’s sojourn with the Mongols was the building of an observatory in Azerbaijan at Maragha under his direction, where the most renowned scientists of the time, including astronomers from China, participated in research and scientific observations. In 1274 CE, Tusi left Maragha with a group of his students for Baghdad, where he died in the same year.

Islamic and Western scholars believe that the innovation in astronomy in the Islamic world, created by the Maragheh Observatory, is due to the Iranian genius Khajeh Nasir al-Din al-Tusi, whose comprehensiveness is widely acclaimed.

The ensemble of Tusi’s writings amounts to approximately 165 titles on a wide variety of subjects. Some of them are simply a page or even half a page, but the majority with few exceptions, are well prepared scholarly works on astronomy, ethics, history, jurisprudence, logic, mathematics, medicine, philosophy, theology, poetry, and the popular sciences. Tusi’s fame in his own lifetime guaranteed the survival of almost all of his scholarly output. The adverse effect of his fame is also the attribution of a number of works that neither match his style nor have the quality of his writings.


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