Wisu - Definition and Overview

Wisu (Isu) is a historical area in upper Kama, modern Perm Oblast of Russia.

In 10-14th century this area was described by Ahmad ibn Fadlan, Al-Gharnati and others.

In Russian chronicles of 12-16th century it is known as Great Perm.

There is an information about Wisu's tributes to Volga Bulgaria.

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