The Complex of Izadkhast is an architectural complex located in the city of Izadkhast in the Fars Province of Iran. The complex consists of a castle, a caravanserai, a qanat (underground water supply system), and a bathhouse.

The castle, also known as Izadkhast Citadel or Dezh-e Izadkhast, is a large fortified structure built during the Sassanid Empire, possibly in the 3rd century CE. The castle has been built with a combination of stones, bricks, and mud, and features thick walls, ramparts, watchtowers, and underground tunnels. The castle was used as a military base and a safe haven for the people during the invasions.

The caravanserai, located near the castle, was built during the Safavid period in the 17th century CE. It is a large, rectangular structure with a central courtyard, surrounded by chambers and stalls for the travelers and their animals. The caravanserai was used as a resting place for the caravans and merchants traveling along the Silk Road.

The qanat of Izadkhast is an ancient water supply system, which dates back to the Achaemenid period. The qanat is a series of underground tunnels and channels that bring water from the mountains to the city and the surrounding areas.

The bathhouse, also known as the hammam, was built during the Safavid period in the 17th century CE. It is a large, domed structure, featuring a series of interconnected rooms, heated by a furnace, and used for bathing and relaxation.

The Complex of Izadkhast is a unique example of the Persian architecture and engineering, reflecting the historical, cultural, and technological achievements of Iran throughout the centuries.