Explanation:

- Mint (Option 1): A mint is a production facility where coins, medals, or tokens are manufactured. Most countries have their own mints, which are responsible for producing the nation's legal tender and sometimes commemorative coins.

- Mill (Option 2): A mill is a facility where raw materials, like grains or timber, are processed into finished products or semi-finished goods. It's associated more with processing than with manufacturing coins.

- Workshop (Option 3): A workshop typically refers to a small place where manual or artisanal work is done. It's not specifically related to the production of coins or medals.

- Casting (Option 4): Casting refers to a manufacturing process where material is poured into a mold to create a shape. While casting can be part of making medals or tokens, it doesn't represent the complete process of minting coins.