Mark Thallander plays "Meditation" by Charles Callahan on the largest pipe organ in the world

Prelude on NICAEA by Charles Callahan

Charles Callahan: "There Is a Balm in Gilead" (West Point Cadet Chapel Organ)

Ave Maria - a setting by Charles Callahan

Aria - Charles Callahan

For the Beauty of the Earth - Voluntaries for Manuals - Charles Callahan

Charles Callahan: Partita on „Lasst uns erfreuen“ - Hans Uwe Hielscher, Marktkirche Wiesbaden