The beginning of the piece is indeed O Lord Save Thy People.
The 1812 Overture is famous for its very epic finale, and though the piece was written to celebrate the anniversary of Russia’s victory over France in 1812, the piece’s finale is very often used for the 4th of July during fireworks displays.
This is the entire recording of the piece; to hear the very famous finale. Enjoy!
I’ve heard the music, but never “heard” it before! Thank you so much. This brings a whole new wonderful meaning to the piece for me. I will never hear it the same again. Thank you!!!!