Numismatic Puzzle: Syracuse

This tetradrachm from Syracuse (around 500 BC) features an important innovation: an actual depiction on the reverse! In the incuse square you can see the head of Arethusa, which was later to occupy the entire reverse.

Numismatic Puzzle: Treasure Island Gotland

In this puzzle, you will find a treasure. Once you’ve solved it, you can marvel at a shiny part of the treasure hoards of Visby on the island of Gotland!

Numismatic Puzzle: Vitruvian Man

This time, try your hand at Leonardo da Vinci’s Vitruvian Man. The reward is the legendary image in ultra high relief on an issue by Coin Invest!