1.Great Britain 2.France 3.United States 4. Italy At center of conference were the leaders of the three "Great Powers": President Woodrow Wilson of the USA, and Prime Ministers David Lloyd George of...
1.Great Britain, 2.France, 3.United States, and 4. Italy.
Russia and Germany.
Germany was not invited for obvious reasons. Russia was also left out since they pulled out of the war early.
If you mean the 1914-18 Great War, the conference was held in the Palace of Versailles.