Dome.
Pitched brick barrel vault.
Barrel vault.
Groin vaults.
Rib vault.
Fan Vault.
Hyperbolic paraboloids.
Answer:
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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.
