Very interesting video about spiders and colour vision. Some fantastic close-up videos of the spiders too. Even some with translucent bodies, you can see their eyes moving inside their body.
This is the northern rose window from Notre-Dame de Paris. I was there not that long before the fire. Amazingly, it seems as though all the stained glass in this photo actually survived the conflagration. This window was first made in about 1250, and most of the original glass is still in place.