From THE GUARDIAN:
Literature and architecture researchers at North Carolina State university have created an auditory and visual simulation of what it might have been like to stand in front of St Paul's Cross pulpit in the courtyard of St Paul's Cathedral almost 400 years ago, being preached to by poet John Donne.
Dr John Wall, leader of the Virtual Paul's Cross Project, said: "We know that large crowds showed up to hear Donne's sermons, but it was unclear whether they could even hear what was being said. By using the models we created for this project, we learned that the courtyard space allowed sound to reverberate, amplifying the voice of the speaker. This means the sermon had to be delivered at a measured pace to keep the speech from being garbled as the reverberating sounds overlapped. Those are insights we wouldn't have without this project."
The recreated sermon was originally delivered on Gunpowder Day, 5 November 1622 by Donne, and was written to reassure English puritans that King James I's desire to secure an allegiance with the Spanish, by arranging a match between his son Charles and the Spanish princess Maria Anna, did not presage a return to Catholicism for England.