Ka'ba-ye Zartosht

The Ka'ba-ye Zartosht (alt: Kaba-ye Zardusht, Kaba-ye Zardosht, Persian: کعبه زرتشت), meaning the "Cube of Zoroaster," is a 5th century B.C.E. Achaemenid-era tower-like construction at Naqsh-e Rustam, an archaeological site just northwest of Persepolis, Iran. This enigmatic structure is one of many surviving examples of the achaemenid architectural design.

The name Ka'ba-ye Zartosht probably dates to the 14th century, when many pre-Islamic sites were identified with figures and events of the Qur'ān or the Shāhnāme. The structure is not actually a Zoroastrian shrine, nor are there reports of it ever having been a pilgrimage site.

The structure, which is a copy of a sister building at Pasargadae, was built either by Darius I (r. 521–486 BCE) when he moved to Persepolis, by Artaxerxes II (r. 404–358 BCE) or Artaxerxes III (r. 358–338 BCE). The building at Pasargadae is a few decades older. The wall surrounding the tower dates to Sassanid times.