Tashkent is the capital of Uzbekistan and one of the biggest cities of Central Asia. Tashkent is the north-east of Uzbekistan at foothills of Tien Shan mountains at the height of 440-480 meters in the valley of Chirchiq river. Fortified city Chach, which was located in place of modern Tashkent, was mentioned in the second century B.C. It was important trade center. In the eighth century, Chach was destroyed by Arab conquerors and it regained its importance as the large trade city in the 14-15th century during rule of Amir Temur. Name of Tashkent was changed several times during its history and it received current name in the 11th century, which means “Stone city” in translation from Uzbek language.