Just those windows in the gable or all? IMO no grids but the same shape as the rest of the windows so probably 3 either as the rest or all with no grids

@Patricia Colwell Consulting, thank you. The plan is to replace the gable windows only. The remaining windows, doors and skylights are newer (replaced 15 years ago).

Maybe something like this to really allow the light in.

I'd keep the solution simple.

Simple three gang transom, and 40 gallons of paint! The floors a re lovely.....an awful lot of wood for me: )

Makes the room feel very squatty , cut in half when it is not that. Unless a reason and something outside to block? I'd want more window ....below the transom.

This feels a big TEASE?

I understand you like the light from the transom, but having it, makes you want more below. A big sideboard and a huge mirror might help.

Maybe one of the tech weenies here will reimagine the space minus all the wood and let in the feeling of vault.

Emily wins again to my eye. Putting rectangles up there insults the gable end of the home. The arch maybe 'dated' but it's fit is better than a rectangle. I agree increase the glass and follow the roof line for the best effect. A few homes in our neighborhood have had to replace their arched windows. I don't think the rectangles did the home any favors.

I sort of like Emily's idea for sure if only those windows being replaced , of course the exterior will need work too no matter what .