Kavad I, Sasanian King of Kings of Iran (born 473)

Year 531 (DXXXI) was a common year starting on Wednesday of the Julian calendar. At the time, it was known in the Roman Empire as the Year after the Consulship of Lampadius and Probus. The denomination 531 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Kavad I was the Sasanian King of Kings of Iran from 488 to 531, with a two or three-year interruption. A son of Peroz I, he was crowned by the nobles to replace his deposed and unpopular uncle Balash.

The Sasanian Empire, officially Eranshahr, was an Iranian empire that was founded and ruled by the House of Sasan from 224 to 651. Enduring for over four centuries, the length of the Sasanian dynasty's reign over ancient Iran was second only to the directly preceding Arsacid dynasty of Parthia.

King of Kings was an imperial title employed primarily by monarchs based in the Middle East and the Indian subcontinent. Commonly associated with Iran, especially the Achaemenid and Sasanian Empires, the title was originally introduced during the Middle Assyrian Empire by King Tukulti-Ninurta I and was subsequently used in a number of different kingdoms and empires, including the aforementioned Persia, various Hellenic kingdoms, India, Armenia, Georgia, and Ethiopia.

Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the northeast, Afghanistan to the east, Pakistan to the southeast, and the Gulf of Oman and the Persian Gulf to the south. Iran ranks 17th globally in both geographic size and population and is the sixth-largest country in Asia. Iran is divided into five regions with 31 provinces. Tehran is the nation's capital, largest city, and financial center.