In Britain, an estimated 35,000 demonstrators took over London's Hyde Park on Saturday to call for job security and an environmentally sustainable economic system. They were marching under the motto "Put People First."
In Germany, trade unionists and anti-globalization activists marched Saturday in Berlin and Frankfurt, calling for economic justice and holding accountable those who sparked the crisis.
German anti-globalization group Attac wants banks to pay for the effects of the crisis, instead of saving them with taxpayers' money. Other groups said the crisis marked the end of capitalism, with an estimated 10,000 to 15,000 marching through the banking district in Frankfurt, one of Europe's largest financial hubs.
The demonstrations came less than a week before a meeting of the Group of 20 leading economies. World leaders, including U.S. President Barack Obama, are due to meet in London on April 2 to discuss ways to tackle the financial crisis.
Two days later, the North Atlantic Treaty Organization will have its 60th anniversary summit in Strasbourg, France, and in the cities of Kehl and Baden-Baden in Germany.
Officials expect both summits to be met by significant protests.