Abstract: A thin-walled, light weight crypt form/liner is provided for use in making monolithic mausoleums. The crypt form/liner includes a first side, a second side, and a top defining an open-ended chamber having a front edge. The top, first side, and second side of the form/liner can be pleated. A two tier frame is formed on the front edge to facilitate interconnection of adjacent form/liners. The second tier of one form/liner overlies the first tier of an adjacent form/liner. The two tiers include bolt holes which are aligned when the form/liners are positioned adjacent each other. A connecting rod is mounted to one of the form/liners, and is sized to extend through the bolt holes of both adjacent form/liners to extend beyond the front edges thereof. The front frames define a shoulder which surrounds the opening to the crypts. A sealer plate is mounted in the shoulder. A memorialization plaque is mounted on the connecting bars.