Alabaster window, with an image of a dove, symbol of the Holy Spirit in center of the 'Gloria', depicting angels and enormous billowing clouds, whose sunlight is turning into artificial rays of gold and is pouring onto the faithful, above Cathedra Petri, designed in the 17th century by Italian Baroque artist Gian Lorenzo Bernini, located in the apse of Basilica 'Saint Peter' in Vatican City, Rome, Italy.