Kim Patrick Clow wrote:

>how many dies iraes are there? I would gather that Verdi's and Mozart's
>would be the most ...dramatic...?

There are thousands of settings of this text out there. Some examples:

Britten: War Requiem
Verdi: Requiem
Mozart: Requiem
Faure: Requiem (text abridged)
Dvorak: Requiem

There are certainly more!

Kevin Sutton