So amazing. I spend countless hours searching for keys and my glasses. Doesn't everyone? The original key used at Stirling Castle in Scotland. The Castle dates from at least the early 12th century; present buildings mostly built between 1490 and 1600. I wonder how big this key is? I'm sure it must be quite large, never to have been lost in 900 years, counting from the 12th century to the 21st century! It's beautiful, isn't it? via