Ka'aba (Cube) of Zoroaster

The Ka'aba of Zoroastro, a stone building similar to a quadrangular stepped tower, is among the buildings of this ancient complex that dates back to the beginning of the Achaemenid period whose use has not been clarified until now (probably a mausoleum, treasury or treasure house) , temple, temple of fire etc. ..).
On three sides of this building were engraved two important epigraphs of Shapur I (Flavor I) and Kartir in three languages, ancient pahlavi, Parthian and Greek pahlavi presenting Shapur I, his victories over the Romans, Valerian's attack with 70000 men to Iran etc ..
This stone building which is located right in front of Darius II's tomb, about 150 years ago became famous as "Zoroaster's Cube" and was first known as "Kornā-ye khāne", or "naghāreh khāne" and "Zoroastrian temple of fire" ".
Because the shape of the building was cuboid and the black stones that were placed on the white background of its walls were reminiscent of the "black stone", the Ka'aba of the Muslims, was called "Ka'ba di Zoroastro".
In the Sasanian period the name of the building was apparently "Bun Khānak" (the house foundation) and this expression in the inscription of Kartir, Zoroastrian priest, (around 280 AD) was engraved on the walls of the building.
The stone pieces of this building are about 15 meters high, they are large and rectangular and have been placed one on top of the other without the use of mortar on a platform with three steps. This building has a very heavy stone door with two sliding doors which gives access to a square room.
Four monumental tombs have been excavated in the heart of the Rahmat mountain and belong to Darius the Great, Xerxes, Ardeshir I and Darius II and all have similar characteristics.