This scene is of the Trinity - God the Father, the Holy Spirit as a dove, and Christ tranquil on the cross. But of course all three, in Christinity are One: so God the Father is also Christ, risen from the dead, and Christ is God the Father. The Virgin stands on the left below, and opposite her, Saint John on the right. All these figures are inside what can only be a sepulchre, with God the Father standing on a ledge in front of the tomb itelf. Just outside, kneeling on a ledge, are the two donors, praying, one in red, one in black (colours signifying passion and death).
