Selitrennoe or Sarai-Batu, located about 150 km from Astrakhan. Sarai-Batu founded in 1250 by Khan Batu. The town existed until 1502, and at one time was a thriving commercial and political center. During most of the city's population was 75 000 people, while, for example, in London and Paris lived half people.

Sarai-Batu, the grandson of Genghis Khan founded, distinguished accomplishment. Already in the Middle Ages, there was running water and sewerage, functioning public baths and toilets. The city practically ceased to exist in the XV century during the civil wars of the Golden Horde, then he was captured by Tamerlane. A significant part of the brick buildings were demolished for the construction of the Astrakhan Kremlin in the XVI century.

In 1710, Peter I ordered to build on the site of Sarai-Batu processing plant nitrate, which is used for the manufacture of gunpowder. Hence the modern name of the ancient city. A century later, nitrate reserves are exhausted, the plant was closed, but the village continued to exist.

In the middle of the XX century began serious archaeological research Selitrennoe, maintained to this day. During this time, scientists have discovered about forty different objects, such as the palaces of the rich aristocrats and homes of ordinary people, mosques, public baths and much more. Explore the area more than thirty thousand square meters of land recovered pottery, bone cutting, glassware and more.

In 2003, on the basis of settlement is a museum, and the object is recognized as a historical monument of federal significance.