Short answers, pulled from the story.
The Paris Peace Conference 1919 opened on the 18th of January 1919 at the Palace of Versailles in Paris. Delegates gathered at the Quai d'Orsay to begin proceedings that would reshape the world.
Georges Clemenceau, David Lloyd George, Woodrow Wilson, and Vittorio Emanuele Orlando dominated the decision-making process through informal meetings. These four leaders met one hundred forty-five times to agree upon all major decisions before ratification by other attendees.
The Treaty of Versailles was signed on the 28th of June 1919 assigning liability for damages caused to the Allies by Germany and her allies. Article 231 of that treaty placed responsibility for the war on the aggression of Germany and her allies.
Russia was formally excluded from the Conference although it had fought against the Central Powers for three years during the conflict. The German Weimar Republic was not invited to attend the conference at Versailles while representatives of White Russia but not Communist Russia were present.
An Inter-Allied Women's Conference convened from the 10th of February to the 10th of April 1919 to lobby delegates including Wilson to admit women to its committees. One key outcome was Article 7 of the Covenant of the League of Nations stating all positions under or in connection with the League shall be open equally to men and women.