Walls - Stronghold 3 Buildings

Wooden Walls

Cost: 4 wood

There is only one type of wooden wall available and will only provide a very basic defence against an advancing siege force. They are very cheap and effective at dealing with minor problems such as outlaws and wolves.

Stone Walls

Cost: 5 stone

These thick walls of heavy stone and earth are the staple defence of the strongest castles.  They are the only wall type that is wide enough to allow troop movement on top of them. They're expensive to create, and difficult to knock down.

Stone Curtain

Cost: 2 stone

A single thickness stone wall that will slow progress of enemy troops, but will put up only limited resistance to a catapult attack. There is no walkway upon these narrow walls; they are primarily used as a cheap stone wall to surround your castle.  They can also be built to strategically section off areas of your castle without exposing castle walkways to enemy troops.

Stairs

Cost: 10 stone

Place stairs against a wall to give troops access to the tops of castle walls.  Note that troops cannot stand on a stone curtain wall.

Bastions

Cost: 10, 15, 20, 50, 50, 75

Bastions are castle buildings that can be placed within walls to help strengthen your defences.  They also feature connection points, similar to towers, allowing you to connect a section of wall between a bastion and another bastion, tower or gatehouse.  For example, if you wished to section off an area of castle using a stone curtain wall you would need to place 2 bastions, allowing you to build the curtain wall in-between.