Abstract: A lightweight preformed environment resistant display block adapted to provide a display means of a plurality of like modular display blocks for exhibiting various articles in a number of different display arrangements. A modular display block of integral homogeneous polyhedral hollow form including side walls, a bottom wall, and a top wall located below top edges of the side walls to provide a pocket or cavity for holding displayed articles. Means are provided on said bottom wall and on edges of said side walls for interlocking modular display blocks in a number of different display arrangements.