Arrow Slit Window.

The interior work on the 'tower' has been temporarily halted, due to my incapacity; but I shall return to work on Monday.

This photo is piss-poor. However, this is roughly how my faux-medieval-arrow-slit-window looks from the inside. It's now glazed, and really does have a genuinely ancient look about it.

The window faces due east and, as intended, the morning sun throws interesting patterns of light on both the floor and wall.

I offer no prizes for observations about the above!