Abstract: A modular display system including a plurality of display tiles insertable into slideways in a display tile holder. Each display tile includes a display panel, a slide panel, and a spacer extending therebetween. The display tile holder includes a base panel and a plurality of first slideways and a plurality of second slideways orthogonal to the first. The display tile holder includes a plurality of retainers each supported in spaced relation from the base panel and arranged in an array to define the slideways. Multiple display tile holders are joined together with a connector that engages connector sockets disposed on the base panel. Preferably, the display tile holders are connected together such that at least one slideway from each of the display tile holders is aligned with another slideway. The modular display system may include mounts attachable to a vertical surface and operative to support the display tile holders.