[Bonnyboy]

I was wondering if anyone had any idea what this house might have been used for in earlier times. It looks a bit like a church window to me. It was uncovered some 10 to 15 years ago when council grants were being done in the area. At the time the local press done a few pics and a bit of a story. As I recall the contractors were told to leave it uncovered whilst investigations were carried out.
The chap there now, has made a start to render it over so I took some pics before it gets covered up again for however many years.
It's near the top of the bottom block on Sultan St. Any Ideas?