Public square 
The Registan was a public square, where people gathered to hear royal proclamations, heralded by blasts on enormous copper pipes called dzharchis - and a place of public executions. It is framed by three madrasahs (Islamic schools) of distinctive Islamic architecture.
The three madrasahs of the Registan are: the Ulugh Beg Madrasah (1417–1420), the Tilya-Kori Madrasah (1646–1660) and the Sher-Dor Madrasah (1619–1636). Madrasah is an Arabic term meaning school.
15th Century 
Ulugh Beg Madrasah (1417–1420) 
The Ulugh Beg Madrasah, built during the Timurid Empire era of Timur—Tamerlane, has an imposing iwan with a lancet-arch pishtaq or portal facing the square. The corners are flanked by high minarets. The mosaic panel over the iwan's entrance arch is decorated by geometrical stylized ornaments. The square courtyard includes a mosque and lecture rooms, and is fringed by the dormitory cells in which students lived. There are deep galleries along the axes. Originally the Ulugh Beg Madrasah was a two-storied building with four domed darskhonas (lecture rooms) at the corners.
The Ulugh Beg Madrasah was one of the best clergy universities of the Muslim Orient in the 15th Century CE. Islamic scholar Abdurakhman Djami, a prominent poet, scientist and philosopher studied at the madrasah. Ulugh Beg himself gave lectures there. During Ulugh Beg's government the madrasah was a centre of secular science.
17th century 
Sher-Dor Madrasah 1619–1636) 
In the 17th century the ruler of Samarkand, Yalangtush Bakhodur, ordered the construction of the Sher-Dor and Tillya-Kori madrasahs. The Sher-Dor (Having Tigers) Madrasah was designed by the architect Abdujabor. The decoration of the madrasah is not as refined as that on the Ulugh Beg madrasah of the 15th century - the "golden age" of Timurid Samarkand architecture. Yet the harmony of large and small rooms, exquisite mosaic decor, monumentality and efficient symmetry, all place the structure among the finest architectural monuments of Samarkand.
Tilya-Kori Madrasah (1646–1660) 
Ten years later the Tilya-Kori ("Gilded") Madrasah was built. It was not only a residential college for students, but also played the role of grand masjid (mosque). It has a two-storied main facade and a vast courtyard fringed by dormitory cells, with four galleries along the axes. The mosque building (see picture) is situated in the western section of the courtyard. The main hall of the mosque is abundantly gilded.
Other buildings 
Mausoleum of Shaybanids 
To the east of the Tilya-Kori Madrasah, the mausoleum of Shaybanids (16th century) is located (see picture). The real founder of Shaybanid power was Muhammad Shaybani - grandson of Abu'l Khair. In 1500, with the backing of the Chaghataite Khanate, then based in Tashkent, Muhammad Shaybani conquered Samarkand and Bukhara from their last Timurid rulers. The founder of the dynasty then turned on his benefactors and in 1503 took Tashkent. He captured Khiva in 1506 and in 1507 he swooped down on Merv (Turkmenistan), eastern Persia, and western Afghanistan. The Shaybanids stopped the advance of the Safavids, who in 1502 had defeated the Akkoyunlu (Iran). Muhammad Shaybani was a leader of nomadic Uzbeks. During the ensuing years they substantially settled down in oases of Central Asia. The Uzbek invasion of the 15th Century CE was the last component of today's Uzbek nation ethnogeny.
The ancient trading dome Chorsu is situated right behind the Sher-Dor. Now it is well restored. The existence of the trading dome at this place confirms that the Registan was medieval Samarkand's commercial center and the plaza was probably a wall-to-wall market. During the Soviet era, the site was restored, which included digging down 3 meters to its original level to expose the buildings' full height.
See also 
|Wikimedia Commons has media related to: Registan|
- Mukminova, RG (2007). "The role of Islam in education in Central Asia in the 15th -- 17th centuries". STUDIES ON CENTRAL ASIA Nuova serie. 1 87: 155–161.