The Nicene Creed is best known for its develop of an orthodox formulation of the doctrine of the Trinity. Due to Trinitarian formulation the Creed has been accepted an “ecumenical creed.” Nevertheless, an under scrutinised aspect of the Creed is its statement on baptism. This paper will examine the Creed’s understanding of baptism. It will consider the question of what is meant by the idea of “one baptism” and “for the remission of sins.” The aim of the paper will be to place this statement in its historical context while giving thought to its use in modern theological conversations. To this end, the paper will consider what the nearest historical examples of early church baptism were, and how these examples tie to the idea of “remission of sins.” It will also study the statement “one baptism.” Placing these two claims about baptism in their historical context, the paper will then turn to the question of the extent to which the confession of “one baptism for the remission of sins” can be confessed by Christians in modern theological discourse. To what extent is this portion of the Creed still an ecumenical statement or does the contemporary theologian need to conceive of confessing this in some manner other than what the historical context intended for the confession of “one baptism for the remission of sins” to remain ecumenical?