STOCKHOLM, SWEDEN - MAY 1: Aerial view from Katarina elevator of a socialist demonstration on May 1, 2009 in Stockholm. The city is built on 17 islands and often called the Venice of the north. Shutterstock Image - STOCKHOLM, SWEDEN - MAY 1: Aerial view from Katarina elevator of a socialist demonstration on May 1, 2009 in Stockholm. The city is built on 17 islands and often called the Venice of the north. - ID: 1032339469