The first westerner to visit 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. He believed the reason behind the construction of Persepolis was the need for a majestic atmosphere, as a symbol for their empire and to celebrate special events, especially the “Nowruz”, (the Persian New Year held on 21 March). For historical reasons and deep rooted interests it was built on the birthplace of the Achaemenid dynasty, although this was not the centre of their Empire at that time.
The main characteristic of Persepolitan architecture is its columns, which were made of wood. Only when even the largest cedars of Lebanon or the teak trees of India did not fulfill the required sizes did the architects resort to stone. The bases and the capitals were always of stones, even on wooden shafts, but the existence of wooden capitals is probable.
The remains including the bas-reliefs and sculptures provide an insight into hearts and beliefs of the ancient Persians (Iranians). The buildings at Persepolis are divided into three areas; military quarters, the