Yezidabad castle
Nakhchivan, Azerbaijan
The Yazdegerd Castle is a pre-medieval Sassanid castle in Nakhchivan, Azerbaijan. It is constructed solely of mud. The castle is named after the last Sassanid king, Yazdegerd III (632–651). Outside of scientific circles the castle is commonly known as Nakhchivangala or Kohnagala. It currently houses a museum.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).