On the territory of Dehistan remained a number of medieval castles, layout of which is a rectangle with rounded towers at the corners (settlement Grade-Kala, yilanli, R. Kala, etc.). By the way, in addition to rounded towers on the corners of the fortress Dehistan have one semicircular tower in the middle of all the sides of the rectangle, such as the planning scheme is the southern and the caravanserai of Dehistan.
Making rounded corners in plan the towers are also Shaim-Kala in Merv, the citadel of Ahura, the walls of Abiverd and many other monuments of the middle ages.
Planning scheme — a rectangle with rounded towers at the corners and along the walls — is used as in the construction of madrassahs, mosques and caravanserais and residential architecture. The monuments of the middle ages with this classic composition in a great number have been preserved on the territory of Central Asia. Of particular interest is the layout of the caravan – Serai Daya-Khatyn, (located on the Amu Darya river in Eastern Turkmenistan), which is presented in the form of a clear square with rounded corner towers, and towers are rounded on the side facades. About surviving the elements in the architecture of the middle ages was noted by A. M. Pribytkova. She writes: “In creating centralized States defensive character structures the initial period of feudalism had lost its practical significance. However, in aerogenerators more features of the previous era, for instance, can be attributed the towers at the corners or the input side, acting like the ancient fore gate structures, which perform a decorative role”.
Interested the General layout of Rabat Daya-Khatyn. The caravanserai surrounded on three sides by a defensive wall with round towers at the corners and square along the perimeter, which forms a bypass around the yard. The Rabat plan of Daya-Khatyn is surprisingly reminiscent of the architectural-planning composition of the complex the Togolok-21.
Interesting schematic layout of the Khorezm ancient monument Yakke-Parsan. It is a rectangle, enclosing a spacious courtyard in the middle, which is a powerful donjon, square in plan and with a “waffle-like” facades. The corners of the rectangular fence decorated round towers, located at the same distance from each other. And on the other side, where there is the entrance doorway of the towers are located closer to the center of the face, thus framing the entrance. At some distance from the wall of the rectangular fence traced the remains of another wall encircling the monument.
Schematic layout of the castle Yakke-Parsan continues planning traditions of ancient Bactria-Margiana Gonur buildings-1 and Tillatoba — square in the middle of a spacious rectangular courtyard.
Also known to many early medieval monuments of Khorezm with the planning scheme in the form of a rectangle with rounded towers at the corners and the perimeter walls is Berkut-Kala, Teshik-Kala, Combusken-Kala and others.
Configuration “rectangle with rounded towers at the corners” remains in the remnants of late medieval Turkmen folk housing “Hovli”, “Kala” and other similar buildings of Central Asia. Such folk architecture can be seen in the Northern territory of Afghanistan.
Thus, in the late bronze age in the architecture of Margiana and Bactria is firmly formed a planning scheme in the form of a rectangle with rounded towers at the corners and perimeter walls, the origins of which may date back to postmenopauzalnom cultures of southern Turkmenistan and that many vestigial remains of architectural constructions of Central Asia subsequent ages until the late middle ages.