As the Christian world marks the 1700th anniversary of the Council of Nicaea, the need to revisit the reception history of its theological legacy becomes pressing. While much scholarly attention has been devoted to the Cappadocian Fathers and Latin pro-Nicene developments in Hilary and Ambrose, Augustine’s engagement with the Nicene faith—particularly in his magnum opus De Trinitate—demands closer inspection. This paper argues that Augustine’s Trinitarian theology in De Trinitate, while not overtly creedal or conciliar, represents a deep and deliberate reception, interpretation, and extension of the Nicene vision. Focusing on De Trinitate Book I and Book V, I explore how Augustine affirms the Nicene homoousios (though not in terminology) by stressing the consubstantiality and coeternality of the Persons within the divine unity. I argue that Augustine’s famously psychological analogies (Books VIII–XV), far from abstracting from Scripture and tradition, are grounded in a doxological and exegetical commitment to the worship of the Triune God as confessed in the Church’s rule of faith—shaped by and responsive to the Nicene framework. Moreover, this paper takes seriously the secondary literature which challenges simplistic claims about Augustine’s supposed distance from Nicene theology. I interact critically with the interpretations of Lewis Ayres’s Nicaea and Its Legacy and the older work from Michel Barnes “Augustine in Contemporary Trinitarian Theology (1995), both of whom have sought to correct older narratives that pit Augustine against the Greek tradition. Ayres’ proposal that Augustine represents a distinct “Latin pro-Nicene” trajectory will be examined in light of textual evidence, especially Augustine’s careful exegesis of John 10:30 and his use of Romans 5:5 in Book XV. At the same time, I engage recent critiques that suggest Augustine’s psychological model departs from Nicene personalism by collapsing personhood into relations or faculties. By situating De Trinitate within the broader fourth-century debates—though composed in the early fifth—I propose that Augustine offers not merely a reception but a critical development of Nicaea, one that resists both subordinationism and modalism through a distinctive theological grammar. His insistence on inseparable operations (opera Trinitatis ad extra indivisa sunt) and the doctrine of divine simplicity (Book VI) are best read as Augustinian answers to the same theological pressures that the Nicene Creed addressed, albeit refracted through a Latin philosophical and pastoral lens. In conclusion, this paper contributes to the commemoration of Nicaea’s 1700th anniversary by positioning Augustine as a vital and faithful heir of the Council’s Trinitarian confession, whose legacy deserves renewed attention within both patristic and evangelical theology.