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.
Fars Province
Pars Province (; , "Ostān-e Pārs", ) also known as Fars (, "Fārs") or Persia in the Greek sources in historical context, is one of the thirty-one provinces of Iran and known as the cultural capital of the country. It is in the south of the country, in Iran's Region 2, and its administrative center is Shiraz. It has an area of 122,400 km². In 2011, this province had a population of 4.6 million people, of which 67.6% were registered as urban dwellers (urban/suburbs), 32.1% villagers (small town/rural), and 0.3% nomad tribes. The etymology of the word "Persian" (From Latin "Persia", from Ancient Greek , "Persís"), found in many ancient names associated with Iran, is derived from the historical importance of this region. Fars Province is the original homeland of the Persian people.