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Khosrow II (spelled Chosroes II in classical sources; Middle Persian: 𐭧𐭥𐭮𐭫𐭥𐭣𐭩, romanized: Xusrōγ/Xusrōw and Khosrau), commonly known as Khosrow Parviz (New Persian خسرو پرویز, "Khosrow the Victorious"), is considered to be the last great emperor of pre-Islamic Iran, ruling the Sasanian Empire from 590 to 628, including an interruption of one year.
Khosrow II was the son of Hormizd IV (reigned 579–590), and the grandson of Khosrow I (reigned 531–579). He was the last emperor of Iran to have a lengthy reign before the Muslim conquest of Iran, which began five years after his execution. He lost his throne, then regained it with the help of the Byzantine emperor Maurice, and, a decade later, went on to emulate the feats of the Achaemenids, conquering the rich Roman provinces of the Middle East; much of his reign was spent in wars with the Byzantine Empire and struggling against usurpers such as Bahram Chobin and Vistahm.
Khosrow II began a war against the Byzantines in 602, ostensibly to avenge the murder of his ally, Maurice. Persian forces captured much of the Byzantine Empire's territory, earning Khosrow II the epithet "the Victorious". The Siege of Constantinople (626) was unsuccessful, and Heraclius, now allied with Turks, started a risky but successful counterattack deep into the Persian heartland. Dissatisfied with the war, the empire's feudal families supported a coup in which Khosrow II was deposed and killed by his estranged son Sheroe, who took power as Kavad II. This led to a civil war and interregnum in the empire and the reversal of all Sasanian gains in the war against the Byzantines.
In works of Persian literature such as Ferdowsi's Shahnameh and Nizami Ganjavi's (1141–1209) Khosrow and Shirin, a famous tragic romance and a highly elaborated fictional version of Khosrow's life made him one of the greatest heroes of the culture, as much a lover as an emperor. Khosrow and Shirin tells the story of his love for the originally Aramean princess Shirin, who becomes his queen after a lengthy courtship strewn with mishaps and difficulties.
General info from Wikipedia.org
