Lock & Key

I guess I'm the kind of person who just thinks about very random things and then has to research to find the answers out. Today my featured item in my shop is the 'Key To My Heart Necklace', now as I was looking at it earlier, I though to myself, just where were locks and keys invented and by whom?  This is how my brain works most times! :)   I did a little research and this is what I found out:
--The oldest lock was found near Nineveh and is said to be 4,000 years old! It was made out of carved wood.
--Romans are believed to have created the first metal locks.
--In 1778 a British locksmith named Robert Barron made a huge leap in lock technology since the Romans. He improved the security of the lock immensely!

Below are pictures of some ancient locks and keys!

Below is the jewelry design that inspired this post, which is still available for purchase! :)