I don't know what to put for this, because I have 2 very favorites.
This is a beautiful proof $20 coin of Canada. The picture isn't good but the coin is beautifully made.
This is a Danish 1 Skilling coin of 1771, it's a newer one in my collection but also very simple and beautiful.
So I would like to get suggestions from you, like a vote to decide which one I should put.