 Bernini created a large bronze throne in which it was housed, raised high on four looping supports held effortlessly by massive bronze statues of four Doctors of the Church, Saints Ambrose and Augustine representing the Latin Church and Athanasius and John Chrysostom, the Greek Church.The four figures are dynamic with sweeping robes and expressions of adoration and ecstasy.Behind and above the cathedra, a blaze of light comes in through a window of yellow alabaster, illuminating, at its centre, the Dove of the Holy Spirit.