Memorialization structures, niches, and methods for manufacturing niches having a recess or cavity that is accessible after installation of the memorialization structures and/or post-burial or post-entombment of a deceased are generally described. In some embodiments, a memorialization niche may include a recess and a door configured to enclose the recess. The door may include a lock configured to prevent public access to the recess. A patron associated with the niche may unlock the door and access the recess. The patron may remove objects from and/or insert objects into the recess post-burial or -entombment of the deceased without disturbing the memorialization structure and/or adjacent memorialization structures and/or requiring a memorial operator to unseal the recess. Accordingly, the patron may continually update the personalization effects of a memorialization structure and achieve a dynamic memorial for the deceased while maintaining the security of any bodily remains and/or personal objects stored in the recess.