Duccio's Maesta

Rear view - crowning panels

6: Descent of he Holy Spirit (Pentecost).

Acts of the apostles

   And when they were come in, they went up into an upper room, where abode both Peter, and James, and John, and Andrew, Philip, and Thomas, Bartholomew, and Matthew, James the son of Alphaeus, and Simon Zelotes, and Judas the brother of James. These all continued with one accord in prayer and supplication, with the women, and Mary the mother of Jesus, and with his brethren.

And when the day of Pentecost was fully come, they were all with one accord in one place. And suddenly there came a sound from Heaven as of a rushing mighty wind, and it filled all the house where they were sitting. And there appeared unto them cloven tongues like as of fire, and it sat upon each of them And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.
(Acts of the Apostles, 1 v 13 -14,  2 v 1 - 4)

Maesta rear index