List of ancient great powers
The Sassanid Empire is the name used for the fourth Iranian dynasty, and the second Persian Empire (226–651). The empire's territory encompassed all of today's Iran, Iraq, Armenia, Afghanistan, eastern parts of Turkey, and parts of Syria, Pakistan, and large parts of Caucasia, Central Asia and Arabia. During Khosrow II's rule in 590–628 Egypt, Jordan, Palestine, Lebanon were also briefly annexed to the Empire, as well as far west as western Asia Minor. The Sassanid era, encompassing the length of the Late Antiquity period, is considered to be one of the most important and influential historical periods in Iran. In many ways the Sassanid period witnessed the highest achievement of Persian civilization. The empire is furthermore known for being the arch-rival of the neighboring Roman–Byzantine Empire for a period of over 400 years. As the Parthians were replaced by the Sassanids, they carried on the already century long lasting Roman–Persian Wars, which would eventually become the longest conflict in human history.
Persian literature
Despite that Asia Minor (or Anatolia) had been ruled various times prior to the Middle Ages by various Persian-speaking dynasties originating in Iran, the language lost its traditional foothold there with the demise of the Sassanian Empire. Centuries later however, the practise and usage in the region would be strongly revived. A branch of the Seljuks, the Sultanate of Rum, took Persian language, art and letters to Anatolia. They adopted Persian language as the official language of the empire. The Ottomans, which can "roughly" be seen as their eventual successors, took this tradition over. Persian was the official court language of the empire, and for some time, the official language of the empire. The educated and noble class of the Ottoman Empire all spoke Persian, such as sultan Selim I, despite being Safavid Iran's archrival and a staunch opposer of Shia Islam. It was a major literary language in the empire. Some of the noted earlier Persian literature works during the Ottoman rule are Idris Bidlisi's "Hasht Bihisht", which begun in 1502 and covered the reign of the first eight Ottoman rulers, and the "Salim-Namah", a glorification of Selim I. After a period of several centuries, Ottoman Turkish (which was highly Persianised itself) had developed towards a fully accepted language of literature, which was even able to satisfy the demands of a scientific presentation. However, the number of Persian and Arabic loanwords contained in those works increased at times up to 88%. The Ottomans produced thousands of Persian literary works throughout their century long lifespan.