I don't often write about fireplace mantels on this site but I thought I would offer some design possibilities to my readers especially those that are DIY (do it yourself) oriented. Of course you don't have to be a do it yourselfer to use this design. After all you could show it to your cabinet maker or trim carpenter so that they could execute the pattern to your fireplace.
I'm not a big fan of Mission style but a friend of mine has been making mission style tables and I thought I would give "Mission" a second look.
From Wikipedia:
Mission Style is a design that emphasizes simple horizontal and
vertical lines and flat panels that accentuate the grain of the wood
(usually oak.
People were looking for relief after the excesses of Victorian times
and the influx of mass-produced furniture from the Industrial
Revolution. The furniture maker, Gustav Stickley produced the Arts and Crafts style furniture of the period. This was plain oak furniture that was upright, solid, and handcrafted.
This mantle, draw with Google
Sketchup, is likely not pure Mission style. The large crown molding should probably go. It may be that the trim that wraps around the firebox opening is a bit much as well, but you, I think get the general idea of what would be called "Mission" styling. The unadorned
wood corbels are typical for the Mission style