Rayen Castle is one of really excellent Iran’s hilights in my humble opinion. Rayen castle is an adobe castle in Kerman province. The well-preserved medieval mudbrick city of Rayen, is not unlike the Bam Citadel in Bam city which was destroyed in an earthquake in December 2003. Rayen displays all the architectural elements of a deserted citadel.Rayen castle has been well preserved, considering the numerous natural disasters that have been destroying similar structures nearby.
Arg-e-Rayen was inhabited until 150 years ago and although believed to be at least 1,000 years old, may in fact have foundations from the pre-Islamic Sassanid.
The Sassanid dynasty (also Sassanian) was the name given to the kings of Persia, which includes much of present-day Iran. During the era of the second Persian Empire, from 224 until 651, when the last Sassanid king, Yazdegerd 3rd , lost a 14-year struggle to drive out the Umayyad Caliphate, the first of the Islamic empires. By the Sassanids, their Empire was called Iran or Eranshahr.The Sassanid era is considered to be one of the most important historical periods in Iran.

The most ancient monumet of naein is Narin Castle (Narenj Ghale) which has very high dried mud walls and is located at the middle of Naein historical texture. According to the surveys and evidences on history, this very famous monument blongs to Partiyan period which was built as a castle or fort in the center of naein. Famous historian and researcher _Estakhri_ has mentoined it’s primeter about 3000 foot which is surrounded by a deep moat.