A columbarium is a room or structure designed as a final resting place to house cremated remains. Columbaria are permanent structures with banks of cremation niches (similar to cubbyholes, but with secure fronts) that hold cremation urns. A columbarium can be large or small, private or public. Some columbaria have glass-front niches, which allow you to see the cremation urns and any personal artifacts placed with them. Other columbaria have granite-front or bronze-front niches that can be engraved or memorialized with a plaque.