This is in an old village hall just outside Peterborough Arched Windows

While this is another from the disused brewery in Lincoln.
Disused Windows

I visited Tunisia a few weeks back, and found this ornate window quite fascinating Tunisian Windows

Some windows are food for the soul like this one in Lille, France Grand Windows or perhaps this one Awesome Windows

And then there are those who are so nosy they use windows to keep an eye on passers by Nosey Windows