Large, dagger like pins were very popular in
Athens, Greece to fasten clothes. But furious Athenian women did
more than fastening their clothes with pins, they killed one Athenian
soldier with it.
The poor soldier had brought them the news of their men being killed
in the war. The killer pins were banned for general safety. But
clothes had to be held together. So the pins got converted in to
large brooches.