Buttons
In the early 14th century,
buttons were at the cutting edge of technology.

Their arrival led to a clothing revolution
– no more having to pull all your clothes
over your head or be sewn into them.
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Buttons are as old as clothing. In the Prehistory old culters over the complete world buttons have been made of stone, pottery, gade-stone, jet, bone, wood, shell, flint, horn of deer or stag, ivory, bronze, argent and gold. They were used for purely practical reasons or as decoration, because even an ordinary button from bone was a decoration of the garment.
Buttons of Kings were more luxuously, such as buttons of gold and glass, wich were found in the tombs of Mykene and sea cultures around the Meditarranean. There are buttons from the 16th century v.C. Women saw rapidly the importance of this practical object and the possibility to make a little gem. Etrucan, Roman or Gaul, female vanity
The standard of living restored and the consequence was rich decorated clothing. Gold - and silversmiths manufactured buckles and hooks, pins and brooches in gold and argent. The locksmiths offered fastenings, large or small but in iron, tin and brass.
During the crusades (11th-13th century), the art of making buttons was imported here from the Near East.
When it became usage to wear clothes narrower around the body, the role of buttons became more important.
There used to be a shop that sold only buttons near Covent Garden in London.
I can't remember exactly where it was,
but I expect it closed long ago
and the site became a chain coffee outlet
or vaping shop.
Good retailing areas will never survive in the UK
as long as developers
are allowed to charge extortionate rents,
turf out local businesses
and replace them with branches
of the usual global and national chains.