1) City in Russia 2) City of Asia 3) City of Russia 4) City in Asia 
Pokrovsk (Покро́вск) is the name of several inhabited localities in Russia. ==Modern localities== ==Historical names== ...
(from the article `Lena River`) Below the Olyokma, the character of the valley changes sharply. For a stretch of about 400 miles (640 km), from Olyokminsk to Pokrovsk (60 miles [100 ...