Basic Gold-boosting building of the Classical Era. * Common traits: * +25% Image:20xGold5.png Gold * +2 (File:BNW-only.png +1) Image:20xGold5.png Gold * 1 Merchant specialist slot * +1 Image:20xGold5.png Gold per incoming Trade Route (also +1 Image:20xGold5.png Gold for the owner of the route) * +1 Image:20xScience5.png Science with Mercantilism Social policy