Decorative wall mount plate holders come in two basic types. The type made of wrought iron, and the type made of wood. The iron ones either go for a very minimalist look, a good choice if you want the focus to be on the plates themselves, or they are very ornate, so that they become as noticeable as the plates being displayed.
Decorative Wall Plate Holders:
Decorative Wall Plate Holders example. Pictured: Olive Leaf Motif Metal 2 Plate Decorative Plate Holder by Private Label.
Decorative Wall Plate Holders example above: 2PO Vertical Antique White Cup & Saucer Wall Rack – 35.5″