Blackbeard’s Cannons- The Mystery His cannons were powerful, but heres the mystery- Archaeologists discovered that no two cannons matched. Different sizes-Different calibers-Different nations- Origins included English, French, Swedish and Dutch. Some cast decades apart. Some patched and repaired. Some may not have functioned at all. Stay tuned this week as we wrap up Blackbeard Month! #blackbeard #pirates #cannons | St. Augustine Pirate & Treasure Museum