The windows are made of aluminum windows, iron windows, and wooden windows, and the window frames above are round
The wooden windows are round, metal window frames can also be made round, but the trouble than wood.
Can be round. Wood windows are not common, but I have seen in the Grand View Garden, round
prison. Wooden windows can be made round. Aluminum, unless it is made, or with the general welding or other technology is difficult to achieve the purpose of beauty