I have in my possession a big coin in a nice box with the papal heraldry of Pope St. John Paul II. 

I am very curious Where this coin came from and why this coin exists. 

I have found many different pictures but none like the one I have.
This is the entire object photographed.

It seems my Grandfather and his brother who was a man of the cloth himself have been to Rome and may have gotten it in Vatican City. I found a photobook with pictures of him on St. Peter's Square and pictures of the Pope he made. (I cannot say which pope or time) 

[![enter image description here](https://i.stack.imgur.com/07pHJ.jpg)](https://i.stack.imgur.com/07pHJ.jpg)

[![enter image description here](https://i.stack.imgur.com/dcBhs.jpg)](https://i.stack.imgur.com/dcBhs.jpg)

[![enter image description here](https://i.stack.imgur.com/NkKQ6.jpg)](https://i.stack.imgur.com/NkKQ6.jpg)