In the City of London on the Circle and District lines, Cannon Street opened in 1884. It was built on the site of the medieval steelyard, the store and trading base for the Hanseatic League, based in England. The brooch is a small replica cannon, an unusual motif to find in jewellery. The cannon was first invented in China. The largest stone ball cannon was made in Russia in 1586.
Trivia Tchaikovsky used a cannon in his 1812 overture.