The main architectural features of Odisha temples are classified in three orders, i.e. rekhapida, pidhadeul and khakra. Most of the main temple sites are located in ancient Kalinga—modern Puri District, including Bhubaneswar or ancient Tribhuvanisvara, Puri and Konark. The temples of Odisha constitute a distinct substyle within the nagara order. In general, here the shikhara, called deul in Odisha, is vertical almost until the top when it suddenly curves sharply inwards. Deuls are preceded, as usual, by mandapas called jagamohana in Odisha. The ground plan of the main temple is almost always square, which, in the upper reaches of its superstructure becomes circular in the crowning mastaka. This makes the spire nearly cylindrical in appearance in its length. Compartments and niches are generally square, the exterior of the temples are lavishly carved, their interiors generally quite bare. Odisha temples usually have boundary walls. Example: Konark Temple, Jagannath temple,Linga...