A stable, multi-component footer is provided for supporting markers, memorials, gravestones and/or monuments in cemeteries and the like. The footer forms a hollow, generally rectangular structure for installation within a grave. It includes a pair of integral vertical side members which are spaced apart sufficiently to accommodate a casket therebetween. An upper horizontal support member extends between and is connected to the upper ends of the two side members, to provide a support plate for the monument. When the footer is assembled, its components are secured detachably by locking means comprising engageable complementary male and female elements. The locking means provides stability to the assembled footer, as well as ease of assembly. In its preferred form, the footer comprises two separate, complemental, interchangeable L-shaped components, one component being in the form of an inverted L and the other being in the form of an upright L. When the two identical L-shaped components are assembled, their respective distal ends are detachably engaged by locking means comprising complemental tongue and groove constructions, or complemental pin and hole constructions, or a combination thereof.