A pediment is an arch or design above the exterior of a window, and it makes the window look elegant and decorative. Typically the pediment is supported by columns.
We had triangular pediments added to our windows and it upped the value of our home, plus it almost entirely changed the look of our exterior (in a completely good way, of course). Also, it didn't require too much exterior work.
“Pediments look amazing over windows - I loved them on ours.”