The Mint

https://publicdomainreview.org/collection/agostino-ramelli-theatre-of-machines

The Mint is one of the main buildings that faces the Agora Square. It is where some of the trustees work, such as the Treasurers. It is, in essence, Veel-Tark's bank and treasury chamber. In the basement are amassed the assets and cryptocurrencies that are mined in the Alchemists' Chamber, a building to which the Mint connects through a long network of tunnels.