The Kok-Gumbaz mosque was built in 1435 by Ulugh Beg on behalf of and during the reign of his father, Shah Rokh. The historical inscription with their names and date of construction encircles the entrance niche of the portal. Nowadays, only the end of Shah Rokh's phrase can be discerned. The remains of a gallery in the form of flat pilasters and traces of plaster left on the lateral facades of the principal building were reflected in the pylons of the gallery discovered during excavations. It exists as a detached item with its back directed to the city street that runs from north to south. It is a large building whose form resembles a cube. The square hall is covered by a sphero-conical dome resting on vaulting pendentives between which are intermediate panels putting the basal parts of the dome onto sixteen pillars. The deep niches in the walls of the square building give the mosque a cross-shaped outline. The side niches used to open into the gallery by means of wide arch passages; now they are bricked up. In the massive the brick walls, four spiral staircases are hidden in the corners, which led to the roof of the gallery. The construction of the mosque is visually protruded by a prism of the major and small squares, and bythe massive low cylinder of the external  decorative dome. The eastern entrance is given emphasis by a large portal with an entrance arch spanning 10 m.

The architectural decoration of the Kok-Gumbaz mosque is representative of buildings of the Ulugh Beg epoch. On the external dome there remain pieces of a brick mosaic inscription framed above and below by majolica borders. The majolica is seen in fragments of the pillars and tympana of the principal arch and wall arches, three quaternary pillars and stalactites. The external blue dome of the mosque that gave the mosque its name is completely lost.

The Koba caravanserai

Caravanserais of the 16th century are an important part of Central Asian civil architecture. They are based around a courtyard rectangular with indented corners. The Koba caravanserai in Shakhrisabz is the only monument of its kind in 16th century architecture. Other caravanserais of the city have not been preserved. The Koba caravanserai by its typology refers to a one-yard, one-storied building with the buildings located along the perimeter of the courtyard. Unlike similar buildings in Samarkand or Bukhara, Koba, constructed in the 16th century, has a more modest architectural appearance. The entrance portal conventionally faces the historical main road of the old-town part of Shakhrisabz. The form of the courtyard is nearly square with chamfered corners of less than 45 degrees. Khudzhras are covered by vaults of a pointed profile. The lack of external decoration, the thickened walls, the courtyard with chamfered corners all suggest that the caravanserai does indeed date from the 16th century. According to stories passed down from generation to generation, merchants from different countries including India used to stay in this caravanserai. There are several theories as to the origin of the name 'Koba1. Some locals believe it comes from the word 'Kuba' (dome); others that it is a variant of the word 'Kufa', suggesting that it was constructed by masters from the Arabian city of Kufa.

The Chubin Complex

The architectural complex Chubin is situated in the north-east of the city, in the makhalla of the same name. No historical or literary data on the construction of the complex are available. The name 'Chubin' most likely refers to the former home of a community of woodworkers.

The monument is a complex composed of functionally interdependent links - mosque, khudzhra, constituting a courtyard anddarvazakhona.

The layout of the main facility of the mosque complex is worked out on two concurrent axes. The compositional center of the building is the square hall covered with a dome. On the west-east axis there is a deep half-octahedral niche serving as mekhrab and the focus of the interior space. On the same axis to the east of the entrance into the mosque is situated a half-octahedral portal niche. On the north-south axis there are two domed halls connected with the main hall by low- level openings and portal entrances overlooking the external facades. The halls are flanked by symmetrical vaulted rooms also facing the external facades and with arch niches. The corner spaces are filled with domed enfilades of two rooms apiece. The external facades of these rooms also have arch niches. In the western enfilades there are additional passages from the main hall in the form of corridors. Thus, the layout concept of the building preserved conventional features inherited from the composite solution of similar monuments of the 1 4th-1 5th centuries.

The facades of the building have a conventional symmetry. The symmetrical axis of the three facades northern, eastern and southern is emphasized by portals. The planes of pylons are transformed into small niches by pilasters. In the niches, arches of four-centered outline are arranged. The layout of the monument may be referred to as central with the emphasis on the principal facade facing the courtyard. The structural-spacial composition of Chubin functionally refers to the honako architectural type and plays a special role in the town-planning structure of Shakhrisabz, with a place in the system of architectural focal points of the ancient city.