Leonardo Da Vinci - Cannons

Having researched quite a lot about the Glasgow International Exhibition of 1901, with particular interest in the Canadian water shute and the switchback railway I was somehow reminded of some of Leonardo Da Vinci's inventions such as the flying machine and giant crossbow.

Giant Crossbow (1480-2)

I decided to do some further research on his work at the Glasgow University Library and found this rather arresting image:

Courtyard of a foundry (1487)

The Local army Barracks where I live in London passes by my house every morning around eight in the morning, parading a canon around the streets.