This first volume includes the original Acta Authentica of the synod, here published for the first time. On facing pages, the corresponding acts, as first published in the Acta et Documenta Synodi Nationalis Dordrechtanae (Leiden, 1620), are reprinted; the published Acta were a significantly revised version, for stylistic and political purposes, of the original Acta Authentica. Also included are the Acta Contracta, a topical summary of the Acta Authentica, and the minutes of the meetings of the state delegates, who represented the Dutch government at the synod; neither of these has been previously published. This volume begins with a general introduction to the Synod of Dordt and its context, an introduction to the Acta Authentica, the published Acta and Acta Contracta, and an introduction to the role of the state delegates and the minutes of their meetings.