A "Qal'eh" is a term used in Persian to refer to a fortress or castle, often built on elevated ground for strategic defense. These structures are typically made of stone or mud-brick and feature thick walls, towers, and sometimes a moat. Qal'ehs were historically important in protecting communities from invasions and served as administrative centers. Many Qal'ehs can be found throughout Iran, showcasing various architectural styles and historical significance. Some notable examples include the Bam Citadel, a UNESCO World Heritage site, and the Kerman Qal'eh, which reflect the rich cultural heritage of the region.