The Gunpowder Factory is a building.
The creation of the Gunpowder Factory is only possible if the technology Cannon Powder has been enabled in the province.
This building requires 18000 man-days
The construction of the building requires 2 political points, 10,000 gold, 50 wood, 100 stones and 200 tools.
In this building you can produce salpetre (1 unit per 10 workers a year)
You can store up to 200 units (instead of 50)