The castle was built during the Sassanid Empire (224 to 651 AD)[3] and functioned as fortified walled city on the ancient Silk Road that ran through central Iran.

Inside the castle walls are many narrow alleyways and passages criss-crossing through centuries old tiny houses and buildings.

[2] The castle and surrounding Izadkhast complex has been nominated to the UNESCO World Heritage Tentative List on August 9, 2007, in the Cultural category.

But a high singular bedrock overlooking a valley was an ideal location for the development of a fortified desert city in the middle of nowhere.

[1] The site's natural topography and added fortifications made the castle one of the most unattainable buildings of the ancient times for robbers and enemies.

[1] The fire temple of Izad Khast Castle from the Sassanid era was turned into a mosque after the advent of Islam to Iran.

Floods in recent years destroyed many homes and forced people to move from this isolated, ancient desert citadel.

However the material wise its comparable to the Citadel of Bam, Rayen and other sites nearby in Yazd and Kerman provinces.