pediment

US /ˈped.ə.mənt/
UK /ˈped.ə.mənt/
"pediment" picture
1.

the triangular upper part of the front of a classical building, typically surmounting a portico or forming a gable over a door or window.

:
The ancient Greek temple featured a beautifully carved pediment.
The architect designed a modern building with a minimalist pediment.