u/Ancient-Calendar7050

Buildings that have been added are Hotel Andaluz, 3rd & Copper parking garage, 301 central Ave building, the crossroads building and the telephone museum of new mexico, I also have a question today when I reach the area where Lindy's Diner is should I build it or keep it as an empty area like how it is now?

I am making a Minecraft city and want to add a real life building and I can't figure out how to make a window arch like this help would be appreciated.