Caviar sturgeon from the Sea of Azov began reaching the tables of aristocratic and noble Byzantine Greeks in the 10th century, after the commencement of large-scale trading between the Byzantine Empire and Kievan Rus'. The main types of caviar are Beluga, Sterlet, Kaluga hybrid, American osetra, Ossetra, Siberian sturgeon and Sevruga. The rarest and costliest is from beluga sturgeon that swim in the Caspian Sea, which is bordered by Iran, Kazakhstan, Russia, Turkmenistan, and Azerbaijan. Wild caviar production was suspended in Russia between 2008 and 2011 to allow wild stocks to replenish. Azerbaijan and Iran also allow the fishing of sturgeon
The Three Types of Legitimate Rule law. On the other hand, these systems can be challenged by the appearance of a new charismatic leader, especially during economic or military crises. These 'pure types' are almost always found in combination with other 'pure types' — for example, familial charisma (important in kingship and the Indian caste system) is a combination of charismatic and traditional elements, while institutional charisma (existing in all church organizations, but absent from a priesthood that fails to develop such an organization) is a mixture of charismatic and legal elements. The Three Types of Legitimate Rule "The Three Types of Legitimate Rule" ("Die drei