The oldest dome in the world in Ardeshir Sassanid palace (Taq-e Bostan)

Ardeshir Babakan Palace or Firouzabad Fire Temple has nested halls and after about 1800 years, the plastering of the upper part of its internal walls is still intact..

This palace, which is one of the valuable monuments of Firouzabad city in Fars province, along with the Dokhtar Castle and Gore minaret, despite its great historical value and importance, and even the discussion of preparing its global registration file was raised, now it does not have suitable conditions and with the development of the village that It is located nearby, there are many graves less than 10 meters from the palace. Although the burial of the dead has been done in this place since many years ago, due to the unclear ownership of the land around the palace, the dead of the village are still buried in the grounds of the Ardeshir Babakan Palace..