The question “Who is who in the Trinity? “ has sparked many heated arguments; Tsar Ivan IV the Terrible posed the question to the “Stoglavy Sobor” (“The Book of 100 Chapters” containing 69 questions asked and answered by the Great Council) in 1551. The answer was: “Christ is the angel in the middle, the one higher than God the Father and God the Spirit.” Thus, in the Orthodox Church, God the Son was put higher than God the Father, while in the Catholic Church they are equal. Four hundred years later the Sobor’s decision was supported by some distinguished art critics, while opposed by most theologians. But as evidenced by the geometry of the Trinity, for Rublev, all three hypostases were equal and placed in a circle. The lines of the wings and clothes fade into each other creating a feeling of balance and calmness. The ideal proportions of the three figures are united by the perfect correlation of colors. The light colors do not compete with the dark ones, but create a glimmering mosaic of light.