Persepolis (Old Persian: Pārsa, Modern Persian: تخت جمشید/پارسه, Takht-e Jamshid or Chehel Minar) was the ceremonial capital of the Persian Empire during the Achaemenid dynasty. Persepolis is situated 70 km northeast of the modern city of Shiraz in the Fars Province of modern Iran. In contemporary Persian, the site is known as Takht-e Jamshid (Throne of Jamshid) and Parseh. To the ancient Persians, the city was known as Pārsa, meaning "The City of Persians". Persepolis is the Greek interpretation of the name Πέρσης πόλις (Persēs polis: "Persian city").

Construction
Archaeological evidence shows that the earliest remains of Persepolis date from around 515 BC. André Godard, the French archaeologist who excavated Persepolis in the early 1930s, believed that Cyrus the Great chose the site of Persepolis, but that Darius the Great built the terrace and the great palaces.

Darius ordered the construction of the Apadana Palace and the Debating Hall (the Tripylon or three-gated hall), the main imperial Treasury and its surroundings. These were completed during the reign of his son, King Xerxes I. Further construction of the buildings on the terrace continued until the downfall of the Achaemenid dynasty.

Archaeological Research
The first westerner to visit the ruins of Persepolis was Antonio de Gouveia, from Portugal, who wrote about cuneiform inscriptions following his visit in 1602. His first written report on Persia, the "Jornada", was published in 1606.

The first scientific excavation at Persepolis was carried out by Ernst Herzfeld in 1931, commissioned by the Oriental Institute of the University of Chicago. Herzfeld believed the reasons behind the construction of Persepolis were the need for a majestic atmosphere, a symbol for their empire, and to celebrate special events, especially the “Nowruz”. For historical reasons, Persepolis was built where the Achaemenid Dynasty was founded, although it was not the center of the empire at that time.

Persepolitan architecture is noted for its use of wooden columns. Architects resorted to stone only when the largest cedars of Lebanon or teak trees of India did not fulfill the required sizes. Column bases and capitals were made of stone, even on wooden shafts, but the existence of wooden capitals is probable.

The buildings at Persepolis include three general groupings: military quarters, the treasury, and the reception halls and occasional houses for the King. Noted structures include the Great Stairway, the Gate of Nations (Xerxes), the Apadana Palace of Darius, the Hall of a Hundred Columns, the Tripylon Hall and Tachara Palace of Darius, the Hadish Palace of Xerxes, the palace of Artaxerxes III, the Imperial Treasury, the Royal Stables and the Chariot House.

Site
Persepolis is near the small river Pulwar, which flows into the river Kur (Kyrus). The site includes a 125,000 square meter terrace, partly artificially constructed and partly cut out of a mountain, with its east side leaning on Kuh-e Rahmet ("the Mountain of Mercy"). The other three sides are formed by retaining walls, which vary in height with the slope of the ground. From 5 to 13 meters on the west side a double stair, gently slopes to the top. To create the level terrace, depressions were filled with soil and heavy rocks, which were joined together with metal clips. Around 518 BC, construction of a broad stairway was begun. The stairway was planned to be the main entrance to the terrace 20 meters above the ground. The dual stairway, known as the Persepolitan stairway, was built in symmetrically on the western side of the Great Wall. The 111 steps were 6.9 meters wide with treads of 31 centimetres and rises of 10 centimetres. Originally, the steps were believed to have been constructed to allow for nobles and royalty to ascend by horseback. New theories suggest that the shallow risers allowed visiting dignitaries to maintain a regal appearance while ascending. The top of the stairways led to a small yard in the north-eastern side of the terrace, opposite the Gate of Nations.

Gray limestone was the main building material used in Persepolis. After natural rock had been levelled and the depressions filled in, the terrace was prepared. Major tunnels for sewage were dug underground through the rock. A large elevated water storage tank was carved at the eastern foot of the mountain. Professor Olmstead suggested the cistern was constructed at the same time that construction of the towers began.

The uneven plan of the foundation of the terrace acted like a castle whose angled walls enabled its defenders to target any section of the external front. Diodorus writes that Persepolis had three walls with ramparts, which all had towers to provide protection space for the defense personnel. The first wall was 7 meters tall, the second, 14 meters and the third wall, which covered all four sides, was 27 meters in height, though no presence of the wall exists in modern times.

See Also:
Persepolis Fortification Archive Project
Virtual Reconstruction of Persepolis
Virtual Reconstruction of, amongst others, Persepolis
Persepolis Before Incursion (Virtual tour project)
Persepolis Satellite view @ Google Maps
Persepolis Photographs and Introduction to the Persian Expedition, Oriental Institute of the University of Chicago.
Photos and a map of Persepolis
PERSEPOLIS RECREATED Documentary Movie