As the idea has gained ground that the euro zone might form an EU inner circle, so Europe itself has come to seem more important to Poland.

ECONOMIST: The euro crisis is a threat to non-members too

Home Office officials have said in the event of an attack, the area immediately surrounding the scene, known as the "hot zone", would have an inner and outer cordon, with mobile shower units.

BBC: Warning over chemical attack 'cordon'

The East Side Gallery was created in 1990, when artists from around the world painted more than 100 works on the part of the inner wall that kept East Germans from crossing into the security zone.

WSJ: In Berlin, Wall Divides Developers, Protesters

He hailed the emergence of a new decision-making body at the EU's inner core, made up of leaders from the 16 euro-zone countries.

ECONOMIST: Charlemagne