Your most favouritest piece of Classical Music

Dominic

not just something you enjoy but your ONE desert Island choice

quarky

Pictures at an Exhibition was always a favourite. Haven't listed to any classical for ages.

Sassafras

Possibly Romeo & Juliet by Prokofiev.
Tough to choose a whole classical piece.

Nomad

guitarmangler

Clair de lune. 

Jalapeno

Barber's Adiagio for strings / Angus Dei (from his mass)

Close second is I Hear The Water Dreaming by Toru Takemitsu - first clocked this on Classic FM on a long drive home, beautiful music.

Dominic

can be just a movement or an aria,caprice,dance,prelude etc ......not a full work

viz

Rach 3

richardhomer

Mozart Clarinet Concerto

Sassafras

Dominic said:

can be just a movement or an aria,caprice,dance,prelude etc ......not a full work

I wish you'd said that at the beginning. I was trying to rack my brains to come up with a complete work.
  

thomasross20

I've honestly not heard enough.... As cliche as this may be, I love moonlight sonata. Always have ever since it was played in the first scenes of the resident evil game..!

Nomad

guitarmangler said:

Clair de lune. 

Love it on orchestral harp...

Legionreturns

Wagners Ring Cycle... or is that cheating? 

Megii

Utterly impossible, but at the moment I'll say this:

HAL9000

Sibelius 4th. I've said it before in this type of thread - Sibelius is, for me, the composer who paints pictures in my head with his music. I love the bleak other-worldliness of this symphony.

Danji

aram khachaturian's violin concerto, or any Bach lute suite.

Steffo

Vivaldi' four seasons

beed84

Beethoven's Egmont Overture by a mile. I'm moved every time I hear it.

littlegreenman

I think some of you are cheating with your eras

merlin

If you're asking about Classical Music as a broad description of composed Music then I would say Mahler's 9th. 
If you're asking about the specific Classical Period then I would probably say Mozart's Requiem. 

Whitecat

This one’s easy - Steve Reich’s ‘Music For 18 Musicians.” Nothing like it.