A columbarium having a framework of a plurality of horizontally spaced vertical risers and a plurality of vertically spaced horizontal members defining a plurality of niches arranged in substantially horizontal rows and substantially vertical columns. Each of the horizontal members has a substantially planar web extending between a front rail and a back flange. A plurality of shutters is removably mounted over the plurality of niches by a concealed mounting system. The concealed mounting system permits the shutters to be movable about three axes of rotation as well as vertically and horizontally with respect to the horizontal members.