The conference of the six Great Powers (which for the first time included Italy) which met in London in May 1867, to settle the political order of northern Europe after the disruption of the German Confederation in 1866, is known as the London Conference of 1867. It resulted in the Treaty of London of 11 May 1867. The immediate occasion of the conference was the necessity of settling the status of the Grand Duchy of Luxemburg, which, after the downfall of the First Napoleon, had been added to the dominions of the King of the Netherlands as a separate and independent state and made a member of the German Confederation. Notwithstanding the dissolution of the confederation, Luxemburg continued to be occupied by Prussian troops, the French government insisting upon the removal of these troops