Glass is technically a liquid which is why old glass, as it slowly melts its way towards the base of the window, ripples so beautifully.

We have a couple of panes or fairly ancient stuff in the presbytery, this one in the door out to the terrace being a good example.
The tree behind it is our (we think) Indian Lilac Tree, as yet we havn’t see it blossom but its hanging balls seem to identify it as that.