Mangazeya

Mangazeya accumulated furs and ivory (walrus tusks) around the year to be shipped out during the short Northern summer.

It became "a virtual Baghdad of Siberia, a city-state, all but independent of the Russian Empire in its wealth and utter isolation.

and the city closed to outsiders: navigational markings were torn up, posts established to intercept anyone who might attempt to get through, and maps were falsified.

[3] The state was unable to collect taxes, and there was a fear of English trading penetration into Siberia; furthermore, "Mangazeya had aroused the envy of inland merchants working out of the Urals, Tyumen, and Tobolsk, who saw it siphoning off commerce that would otherwise have come their way.

"[3] The city was finally abandoned following the catastrophic fire of 1678, after which the remaining population was evacuated to Turukhansk (now Staroturukhansk [ru]) at the junction of the Yenisei with the Lower Tunguska, which was known as New Mangazeya until the 1780s.