Pretty much everything in the world has a purpose. Right? Trees give us oxygen, chairs give us a place to sit, and cremone bolts lock and unlock. Cremone bolts first appeared in the 18th century in France as a means to lock and unlock doors and windows. Cremone bolts are pretty simple, only consisting of three parts, two rods, a knob or handle, and cast housing. There is a rod on top, and a rod on the bottom. When you turn the knob the rod will either go up or down into a socket to lock. It's such a utilitarian thing, yet is so stylish.
In Paris you still see many old apartments using their original cremone bolts to lock doors and windows. I have a feeling in the next year or two we will be seeing more and more houses using this special hardware.
Thanks so much for reading!