This is a cabinet door with glass panels with a design that makes them look like windows. This is more than just a glass panel cabinet door; a mullion is distinguished by pattern or design that is part of the door panel overlaid on the glass.

Mullions add extra elegance to a glass cabinet door option. There are several different mullion designs but the more traditional include the standard 4, 6, or 9-panel windowpane, diamond shapes, arches, and crosses. Custom mullions are possible with artisan woodworkers but mullions strike a balance between overlaid design and framing the glass to see the contents of the cabinet.