874 - 1005 AD. - This time is considered the heyday of cultural development. Literature and natural science, astronomy and philosophy flourished in that period. A large number of cultural centers were established, where people came to contribute to the science and art of the Tajik people. Abu-Rayhan Beruniy, Farabi, Ibn-Sino, Imam Termeziy, Omar Khayyam - these and many other names are known all over the world. They lived and created on the territory of Uzbekistan and Tajikistan.