Memorial Day honors the fallen soldiers, and nothing quite brings a tone of reflection like the Missa Pro Defunctis, the Requiem Mass for the Dead. This version by Ockeghem is the oldest surviving Requiem that we know. It is an a capella performance in the newfangled (at his time in the 1400s) polyphonic style with multiple singers singing different notes at the same time (as opposed to the old Gregorian style where all singers sang the same note).
This Memorial Day weekend remember the fallen.
Requiem aeternam dona eis, Domine, et lux perpetua luceat aeis. Amen.