The Falak ol-Aflak Castle located on a hill overlooking Khorramabad City, Lorestan Province dates back to the Sassanid Empire (224-651 CE).
It is the second biggest adobe construct of the world dating back to Sassanid Dynasty and located in the Kerman Province gaining attention after Bam’s Earthquake.
Iranian architecture can be studied in two eras, pre-Islamic era (divided into two styles of Parsian and Parthian) and post-Islamic era