There are different versions of the origin of the name of Orenburg. Classic is version: a fortress on the river ori. The author of the phrase Orenburg, in all probability, is the founder of the city of I. K. Kirilov. In 1734, in accordance with its the project developed a package of government documents on the basis of the confluence of the ori and the Ural city-fortress. 7 Jun 1734 the Empress Anna Ioannovna signed "Privilege of Orenburg". Although the construction of the main fortress territory later was postponed several times downstream of the Urals, the name of the city, established a "Privilege", has been preserved to this day outside the fortress, founded in 1743, at the mouth of the river Sakmara.