public int inCityDefenseBonus(Hero hero)
	{
		if (buildings.contains(CastleBuilding.CASTLE)) {
			return 12;
		} else if (buildings.contains(CastleBuilding.CITADEL)) {
			return 8;
		} else if (buildings.contains(CastleBuilding.FORT)) {
			return 4;
		}
		return 0;
	}