Who was the first to list christian dogma on nature of Jesus?

The first to formally articulate Christian dogma regarding the nature of Jesus was the early Church Father, Athanasius, particularly in his work "On the Incarnation" in the 4th century. However, the Nicene Creed, established at the Council of Nicaea in 325 AD, is often considered the first definitive statement of Christian belief about Jesus' divine and human natures. This creed affirmed the belief in Jesus as "true God from true God," establishing foundational Christian doctrine on the nature of Christ.