The answer is it then remain preserved over the centuries. Since a layer of the volcanic ash preserve the art and architecture to the residents, the city of Pompeii then provide a snapshot of the Roman art.Hope this would be of help.
The thing that was heard before the armies then meet at the climax of so called the battle on ice in Alexander Nevsky would be a. a chorus singing a homophonic phrase. Hope this is the right answer and would be of help.