According to al-Tabari, Bahram IV was the son of Shapur II, however, several other historians, such as Hamza al-Isfahani, states that he was the son of Shapur III, which seems more likely. Bahram, during the reign of his father, was the governor of Kirman, where he built the town of Shiragan, which would serve as the capital of the province for the remainder of the Sasanian period. The town played an important economic role, as it served as a mint city and had a great agricultural importance to the province. As many other governors of Kirman, Bahram bore the title of Kirmanshah, which would serve as the name of the city he later founded in western Iran. In 388, his father was killed by a party of Iranian nobles. Bahram succeeded him as the ruler of Iran.
Reign
had been divided during the reign of Shapur III according to the terms of a peace treaty. But this arrangement barely survived the reign of Bahram IV. In 389, Khosrov IV, the vassal king of Armenia under Sasanian suzerainty grew wary of his subordination to Iran and entered into a treaty with the Roman emperorTheodosius I, who made him the king of a united Armenia in return for his allegiance. This enraged Bahram and made him have Khosrov imprisoned in the Castle of Oblivion. Bahram shortly made the latter's brother Vramshapuh the new ruler of Armenia. In 395, the Huns invaded the Sasanian province of Asuristan, where they ravaged much of the countryside and took many captives. Bahram IV then had an army sent against them, which managed to kill a great deal of them and regain the riches they had taken including the captives. Bahram IV has been reported to be an ineffective and unpopular monarch, which generally implies that the nobility and Zoroastrian clergy loathed him. He was ultimately killed in 399 by his own troops. He was succeeded by his brother Yazdegerd I.
Coinage
On his coinage, Bahram IV is portrayed wearing the same crown as his predecessors Bahram II and Hormizd II, with the two wings being a reference to Verethragna. The wings are attached to a mural crown, which was a symbol of the supreme god in Zoroastrianism, Ahura Mazda. Bahram IV was the first Sasanian monarch to combine two religious components on his crown. Afterwards such crowns became a common feature among the Sasanians.