Music by Kevin MacLeod. Available under the Creative Commons Attribution 3.0 Unported license. Download link: https://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100811

MacLeod's description:

Genre: Soundtrack
Length: 2:26
Instruments: Cello, Pipe Organ, Trombones, Horns, Trumpets, Tubas, Percussion
Tempo: 140

A sort of steampunk industrial piece with a lovely melody.
ISRC: US-UAN-11-00811
Dark, Driving, Epic, Intense, Mysterious 2011