medieval security wall

abstract ages ancient architecture attack background battlement brick bricks building castle centuries climb construct construction control defending defense defensive dense embattlement empire europe european firewall firm fort fortification fortified fortress gothic hard high historic history inside invade keep medieval merlon middle mighty military obstacle old outside palace past power powerful powers prison protect protection protective rampart reliable robust safe safety secure security signori solid stability stable stone stones stoneware strong stronghold structure sturdiness sturdy thick treviso vintage wall walls weathered