LONDON, CONFERENCES OF. Many important inter national conferences have been held in London during the 19th and loth centuries. The first, in June 1814, was the outcome of the visit of the Allied sovereigns to the Prince Regent after the downfall of Napoleon, the opportunity being used to effect some of the settlements agreed upon in the first Treaty of Paris, notably the conditions attached to the erection of the Kingdom of the United Netherlands. From 1815 onwards, too, diplomatists of the Allies accredited to Great Britain formed a conference in London for the purpose of discussing measures for the suppres sion of the slave trade and of the Barbary pirates.
But in the latter Austria, Prussia and Holland were also repre sented. This conference first met on Nov. 4, 183o, and there were in all 7o sessions. After the independence of Belgium had been recognized and Leopold of Coburg had been elected king (June 4, 1831) a Belgian plenipotentiary was also admitted. On Oct. 1, 1832, Austria, Prussia and Russia having refused to agree to the French proposal to coerce the Dutch king into accepting the 24 articles embodied in the treaty of Nov. 1 83 1, the conference virtually broke up, the further proceedings being conducted by the representatives of France and Great Britain. These ended on May 21, 1833, with the signature of a convention between the two Powers and Holland, providing for the non-renewal of hos tilities and freedom of navigation on the Scheldt and Meuse.
Thus matters remained till 1839 when, the king of Holland hav ing at last consented to recognize the inevitable, the plenipoten tiaries of all the five Powers met in London to sign with those of Holland, on April 7/19, a treaty to which the 24 Articles of Nov. 15, 1831, were annexed (see BELGIUM) .
In 1864, during the war between the two great German Powers and Denmark Great Britain invited the signatories of the Protocol of 1852 to a conference in London, with a view to a settlement. The conference met on April 25, immediately after the storming of the Diippel lines; but, owing to Bismarck's skilful diplomacy, it broke up on June 25 without having effected anything.
In 1867 an important international conference met in London, at the instance of the king of the Netherlands, to deal with the situation in regard to Luxembourg created by the war of 1866 and the consequent dissolution of the old German Confederation. The conference consisted primarily of the representatives of the States signatory of the treaty of 1839, by which the status of the grand duchy of Luxembourg had been determined, i.e., Austria, Belgium, France, Great Britain, Holland-Luxembourg, Prussia and Russia, but on the motion of Lord Stanley, who presided, the Italian ambassador was also invited to assist. The conference resulted in the Treaty of London of May 11, 1867, by the terms of which the Prussian troops, which had garrisoned the city of Luxembourg since 1815, were to be withdrawn and the fortress demolished. On the motion of the Prussian plenipotentiary, Count. Bernstorff, a clause was introduced placing the neutrality of Lux embourg under the guarantee of the signatory Powers.