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=USUAN1100722

MacLeod's description:

Genre: Soundtrack
Length: 2:07
Instruments: Voice, Pipe Organ

Heavy and deep, the chords of this piece resemble Gregorian Chanting with resounding reverb as a harp plucks a few solitary notes. The music evokes an ancient ritual or ceremony, but could also be used for a tragic medieval funeral. 040
ISRC: US-UAN-11-00722
Dark, Mysterious, Mystical 2010