The International Bureau of the Permanent Court of Arbitration (PCA) is proud to present these Centennial Papers, marking 100 years of international dispute resolution at the PCA. This collection features speeches from the PCA's Centenary Celebration, delivered at the Centenary Meeting of the PCA's Administrative Council and at the 1999 PCA Members' Conference. It also contains proceedings pertaining to the PCA from the conferences celebrating the 100th Anniversary of the 1899 Peace Conference (the Hague and St. Petersburg Governmental Conferences and the Hague Appeal for Peace), as well as additional material on the PCA's expanding role in resolving international disputes. These Centennial Papers do not merely reflect on a century of peaceful dispute settlement under the auspices of the PCA, but record developments and potential innovations in international arbitration, and propose future goals in the continuing evolution of alternative dispute resolution.