Abstract: A modular display structure that has a base and a transparent cover. The base and cover may separate to allow insertion of a collectible and may then join to close them and contain the collectible. The base and cover cooperate to define a top, a bottom and sides. A stationary display structure has a column sandwiched between two compartment holders. Each holder is wider than the column and defines partitions spaced apart from each other. The partitions on one holder are in registry with counterparts in the other holder. The modular display structure may be inserted between any pair of neighboring partitions of both holders that are in registry and then snapped into place. The stationary display structure may have levels of compartment holders spaced apart by respective columns, thereby permitting stacking.