Christianity's account of God is built on a claim neither Judaism nor Islam makes: that the one God exists eternally as three persons, Father, Son and Holy Spirit, one in being and yet really distinct from one another. The fourth-century Nicene Creed, drawn up at the Council of Nicaea in 325 and expanded at Constantinople in 381, is the tradition's own settled statement of that claim, confessing one God the Father, one Lord Jesus Christ, and the Holy Spirit, worshipped and glorified together with the Father and the Son. Later controversy over the precise relation of the Spirit to the Father and the Son, the filioque clause added in the Latin West, split Eastern and Western Christianity without ever reopening the doctrine of the Trinity itself; every major Christian body still confesses three persons in one God.
Sophia sits beside that structure rather than inside it. Wisdom personified in Proverbs became, in Gnostic Christian myth, an aeon whose fall from the divine fullness was told to explain how a flawed material world could come from a good God, a story the Apocryphon of John and the Pistis Sophia both develop at length. Mainstream Christianity took a narrower path: Orthodox Christianity reads Holy Wisdom as a title of Christ himself rather than a fourth divine figure, which is what the Hagia Sophia at Constantinople is actually dedicated to. Russian sophiology, associated with Vladimir Solovyov and Sergei Bulgakov, pressed Sophia toward status as something closer to a person in her own right, and Orthodox church authorities condemned that reading in 1935. Sophia's place in Christian thought has therefore always been contested rather than settled, which is part of why this entry records both figures together.