Abstract: A grave marker memorabilia compartment assembly adapted to couple to a grave marker to provide display and storage for mementos and other items of memorabilia pertaining to the deceased comprises a grave marker plate, a retainer coupled to an underside of the grave marker plate for retaining the mementos and other items of memorabilia and a retainer door formed in the grave marker plate that covers the retainer when the retainer door is in a closed position and further allows the contents of the retainer to be viewed when the retainer door is in an open position.