Abstract: A mausoleum and method of constructing a mausoleum. The mausoleum may include plurality of vertically extending walls supportable on a surface, wherein at least one vertically extending wall has a plurality of cells integrally formed therein. At least one cell is substantially filled with a filler material. A roof is supported on the vertically extending walls and cooperates with those walls to define at least one crypt niche having at least one open end. A closure panel corresponding to each open end of each crypt niche is provided. One or more cells within the walls may be unfilled to serve as drain and/or vent passages for each niche. Shelf assemblies may be supported within each niche to form chambers for receiving caskets therein. Each shelf may have open cells formed therein which can communicate with open cells within the walls. A lawn crypt manufactured from similar materials is also disclosed.