The meeting does not appear on the official website of the German foreign ministry as it is meant to be an informal event at the Villa Borsig, north of Berlin. Invited were the foreign ministers of France, Italy, Belgium, Luxembourg, Netherlands, Austria, Denmark, Poland, Portugal and Spain.
But by leaving out 17 of the EU's 27 states, Westerwelle has stepped on the toes of some of his colleagues.
The 11th non-EU nation is Austria.