A Fortress is an upgraded fort that can be built when the population of the colony reaches 8 and already has a fort in place. The stout wooden barricade is reinforced and, in critical spots, replaced by stone masonry. Embrasures now house the artillery, which is more extensively used. Well-planned, overlapping fields of fire characterize the exterior approaches. A fortress overlooking the ocean will slow the progress of foreign vessels and open fire on them if they venture too close.
Armory • Arsenal • Blacksmith's House • Blacksmith's Shop • Carpenter's Shop • Cathedral • Church • Cigar Factory • College • Custom House • Docks • Drydock • Fort • Fortress • Fur Factory • Fur Trader's House • Fur Trading Post • Iron Works • Lumber Mill • Magazine • Newspaper • Printing Press • Rum Distiller's House • Rum Distillery • Rum Factory • Schoolhouse • Shipyard • Stable • Stockade • Textile Mill • Tobacconist's House • Tobacconist's Shop • Town Hall • University • Warehouse • Warehouse Expansion • Weaver's House • Weaver's Shop