It was probably built during the reign of Cyrus the Great but was abandoned after his death in 530 BCE. Like the acropolis in Athens, it may have been intended as a massive fortified plinth to hold palaces and temples.
This was, in fact, realized later at Persepolis when Cyrus' successors built their palaces on large plinths somewhat similar to Tall-e Takht.
Over the mountain to the north of the Pasargadae plain, there is a beautiful area with large stony-white walls, in which many artifacts have been found. Thus, witnessing the reality that this place had been inhabited even before the Achaemenian period, and was most probably used as a praying site. The discovered objects belong to 4000 BC.
Tall-e Takht with 80 m. length and 15 m. height has been made up of some 20 layers of huge stone slabs having up to six tons weight.
Source: Itto (Iran Tourism and Touring Organization).org