A modular display case is an apparatus that houses at least one desired item. The apparatus is able to effectively protect a desired item as the apparatus includes an enclosure, a plurality of lateral walls, a cover, an interconnecting system, a plurality of lamps, and a power source. The enclosure houses the power source and upholds a desired item, the plurality of lateral walls, the cover, and the plurality of lamps. The plurality of walls and the cover surround and aid in the preservation of a desired item. The plurality of walls and the cover are transparent. The plurality of walls and the cover are attachable with each other and the enclosure with the interconnecting system of a plurality of tabs, a plurality of notches, a plurality of first tab-receiving slots, and a plurality of second tab-receiving slots. The plurality of lamps illuminates the desired item with the power source.