Parchments dated in the III - IV centuries AD. They described in detail how the Romans mined coal from natural outcrops, as it was used for drying grain and blacksmithing. As a result of this discovery, the newly found coal outcrop will be used for other purposes.
This Coal Outcrop draft can significantly expedite the processing of coal in your city.
This building occupies 1 cell on the map and can be build on sand and grass.