Pls post a picture of it. Thanks

You can get custom made plantation shutters to fit.

PLANTATION SHUTTERS - ARCHED WINDOW SHUTTERS - Lafayette Woodland Harvest · More Info

Partially cover them.

Drapery Panels for Large Window with Transom and Arch - McFeely Window Fashions · More Info

Use a combination of Roman blinds and drapery.

Dining Room with Draperies, Drum Chandeliers and Stained Wood Dining Table · More Info

Or just cover the whole group of windows. That will be a lot of fabric.

Los Angeles Country Club Estate - Beverly Hills · More Info

thank you for the suggestions! very helpful

I would do solar shades the ones on top could be fixed but the lower ones could be opened on dreary days and left closed to contraol heat and light but keep the view on sunny days. BTW IMO plantation shutters would be all wrong anf heavy looking on those windows.

Designer Laurel Bern has this mockup on her site, featuring a window somewhat similar to hers. You'd no doubt have to have the draperies custom made (and determine where exactly to hang them - looks like you'd still have a portion of the top arch uncovered), but they could be quite lovely.

I would post a pic as far back as possible...showing as much of the room as you can...offering the measurements of the room....seeing the whole room could suggest other options....what we can see seems like curtains just on the bottom would be a viable option

I would get a remote controlled solar shade and have it mounted on the outside of the house, up under the eave where it will never show and lower it when the sun is troublesome. It would not have to reach all the way to the ground, but just far enough to cover the part of the window where the sun comes through. I'm guessing when it's at a low angle it's not the problem but when it gets higher in the sky and more intense. It could easily cover the top part of the window and if you need more coverage on the lower parts you could add another above the main window or use interior shades/shutters