I have put a few links to pictures of medieval cannon in Wikimedia Commons below:
in the late medieval period many medieval castles did have a primitive type of cannon.
The simplest example is a laser pointer.
negros
it looked plain
I dont knoww!
the same as now
ask yo mama
How the heck do you expect me to know?!
medieval times? well
How the heck do you expect me to know?!
ask yo mama
It Looks Ancient and cold.