*Includes pictures *Includes ancient accounts *Includes online resources and a bibliography for further reading *Includes a table of contents Lying in the middle of a plain in modern day Iran is a forgotten ancient Persepolis. Built two and a half thousand years ago, it was known in its day as the richest city under the sun. Persepolis was the capital of Achaemenid Persian Empire, the largest empire the world had ever seen, but after its destruction, it was largely forgotten for nearly 2,000 years, and the lives and achievements of those who built it were almost entirely erased from history. Alexander the Great's troops razed the city to the ground in a drunken riot to celebrate the conquest of the capital, after which time and sand buried it for centuries. It was not until the excavations of the 1930s that many of the relics, reliefs, and clay tablets that offer so much information about Persian life could be studied for the first time. Through archaeological remains, ancient texts, and work by a new generation of historians, a picture can today be built of this remarkable civilization and their capital city. Although the city had been destroyed, the legacy of the Persians survived, even as they mostly remain an enigma to the West and are not nearly as well understood as the Greeks, Romans, or Egyptians. In a sense, the Achaemenid Persian Empire holds some of the most enduring mysteries of ancient civilization. The Parthian people created an empire that lasted almost 500 years, from the mid-3rd century BCE until 224 CE, and it stretched from the Euphrates River in the west to Central Asia and the borders of Bactria in the east (Brosius 2010, 83). In fact, the expansive empire challenged the Romans on numerous occasions for supremacy in the Near East, created the first sustainable link between the peoples of Europe and East Asia, and followed a religion that many consider to be the oldest form of monotheism in the world; but despite these accomplishments the Parthians are often overlooked in favor of the Achaemenid and Sassanid Persians who came before and after them respectively, not to mention the Romans themselves. Although the Parthians may not get top billing in most popular histories of the period, they left an indelible mark on the world that cannot be overstated. During the first half of the 1st millennium CE, an empire arose in Persia that extended its power and influence to Mesopotamia in the east, Arabia in the south, the Caucasus Mountains in the north, and as far east as India. This empire, known alternatively as the Sasanian Empire or Sassanid Empire, was the last of three great dynasties in Persia - the Achaemenid and the Parthian being the first two dynasties - before the rise of Islam. In fact, many scholars consider the Sasanian Empire to be the last great empire of the ancient Near East because once it had been obliterated, Islam became the standard religion of the region, ushering in the Middle Ages. The Sasanian Empire was important for a number of reasons. Besides being the last of three great Persian dynasties, they carried on many Persian cultural traditions relating to religion and kingship. The Sasanians fostered and promoted the native religion of Zoroastrianism to the point of persecuting other religions from time to time. It was during the Sasanian period that the numerous Zoroastrian hymns, prayers, and rituals were collected under one book, known as the Avesta. Thanks to the Sasanians' efforts with regard to religion, modern scholars know much more about Zoroastrianism than they would have if the religion continued to disseminate orally. Their efforts also protected Zoroastrian knowledge in later years after the dynasty was long gone and Islam became ascendant in Persia.