[custom_adv] Persepolis was the ceremonial capital of the Achaemenid Empire (ca. 550–330 BC). It is situated 60 km northeast of the city of Shiraz in Fars Province, Iran. The earliest remains of Persepolis date back to 515 BC. It exemplifies the Achaemenid style of architecture. UNESCO declared the ruins of Persepolis a World Heritage Site in 1979. [custom_adv] Construction of the Sivand Dam, named after the nearby town of Sivand, began on 19 September 2006. Despite 10 years of planning, Cultural Heritage Organization was not aware of the broad areas of flooding during much of this time, and there is growing concern about the effects the dam will have on the surrounding areas of Persepolis. [custom_adv] Many archaeologists worry that the dam's placement between the ruins of Pasargadae and Persepolis will flood both. Engineers involved with the construction deny this claim, stating that it is impossible, because both sites sit well above the planned waterline. [custom_adv] Of the two sites, Pasargadae is considered the more threatened. Archaeologists are also concerned that an increase in humidity caused by the lake will speed Pasargadae's gradual destruction. [custom_adv] However, experts from the Ministry of Energy believe this would be negated by controlling the water level of the dam reservoir. One bas-relief from Persepolis is in the Fitzwilliam Museum in Cambridge, England. The largest collection of reliefs is at the British Museum, sourced from multiple British who worked in Iran in the nineteenth century. [custom_adv] The Persepolis bull at the Oriental Institute is one of the university's most prized treasures, part of the division of finds from the excavations of the 1930s. New York City's Metropolitan Museum houses objects from Persepolis, as does the Museum of Archaeology and Anthropology of the University of Pennsylvania. [custom_adv] A bas-relief of a soldier that had been looted from the excavations in 1935-36 and later purchased by the Montreal Museum of Fine Arts was repatriated to in 2018, after being offered for sale in London and New York. [custom_adv] The Museum of Fine Arts of Lyon and the Louvre of Paris hold objects from Persepolis as well. [custom_adv] Stolze accordingly started the theory that the royal castle of Persepolis stood close by Naqsh-e Rustam, and has sunk in course of time to shapeless heaps of earth, under which the remains may be concealed. [custom_adv] This is not true of the graves behind the compound, to which, as F. Stolze expressly observes, one can easily ride up. On the other hand, it is strictly true of the graves at Naqsh-e Rustam.