Maidams (Assamese language:মৈদাম) are tumuli of the royalty and aristocracy of the medieval Ahom Kingdom (1228-1826) in Assam. The royal maidams are found exclusively at Charaideo, near Sibasagar; whereas other maidams are found scattered in the region between Jorhat and Dibrugarh towns. Structurally, a maidam consists of vaults with one or more chambers. The vaults have a domical superstructure that are covered by a hemispherical earthen mound that rises high above the ground with an open pavilion at the peak called chow chali. An octagonal dwarf wall encloses the entire maidam.