Abstract: A tamper resistant apparatus for removable retention of a memorial marker such as those found at a grave site. The apparatus includes a locking mechanism housed within a cylinder. The cylinder has a cover intended for use exposed to the environment. The cylinder is attached to a footing plate that provides lateral stability during placement of the apparatus in the ground. Horizontal gripping within the ground is provided by a helical anchor attached to the footing plate. The locking mechanism includes a latch which may be moved into and out of a notch in the post of the memorial marker to respectively retain and release the marker from the apparatus.