Ok, some of my fave classical pieces:

Adagio Appassionato for violin & orchestra, Op 57 by Max Bruch

The first time I heard this I was in the car listening to the ABC Classic FM station. I stopped the car to go into a shop but I listened transfixed, tears streaming down my face. When I finally went into the shop the people must have thought someone in my family had died.

When I hear it I think of those dreadful scenes when the Jewish people were discovered in the camps.

But by the end of the piece it is uplifting. So, strength and resilience in times of trouble.

Note: now I am listening to it as I type but I have to hear it to the end. I can't shut it off part way through. When I am anxious or stressed about something I will quite often play it over and over again.

Vivaldi - Gloria RV589
Domine Deus, Rex Coelestis

Vivaldi: Concerto In G Minor For 2 Cellos, RV 531 - 2. Largo - Bobby McFerrin

There are a heap more on my list but that will do for a start.