Curtain Wall
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A curtain wall is a defensive architectural feature of medieval castles consisting of an expansive, high outer wall that encloses the castle's internal buildings and courtyards (baileys). Rather than supporting the weight of a roof, its primary function is to serve as a massive shield against external military assaults.
Key Architectural Elements:
Massive Dimensions: Typically built 20 to 40 feet high and up to 6 to 10 feet thick to withstand battering rams and projectiles.
Mural Towers: Round or square towers projecting outward from the wall at regular intervals to eliminate blind spots and provide flanking fire.
Battlements (Crenellations): The notched top of the wall featuring alternating solid sections (merlons) for cover and open gaps (crenels) for launching counter-attacks.
Wall-Walk (Chemin de Ronde): A protected stone pathway along the top of the wall allowing sentries to patrol and quickly shift defensive positions.
Hoardings or Machicolations: Wooden or stone overhanging galleries with floor openings used to drop rocks, boiling liquids, or arrows directly onto attackers at the base.
The Batter (Plinth): A sloped, thickened stone base that prevents undermining (digging) and causes dropped projectiles to ricochet outward into attackers.
Strategic and Defensive Functions:
Encirclement: It creates a continuous physical barrier around the inner ward, forcing attackers to channel through heavily fortified gatehouses.
Flanking Fire: The integration of projecting towers allows archers to shoot parallel to the wall, targeting enemies attempting to scale the curtain wall itself.
Compartmentalization: In concentric castles, an outer curtain wall mirrors an inner curtain wall, creating multiple layers of defense if the first perimeter falls.
Structural Materials: Constructed using a rubble-fill technique, where two parallel faces of dressed stone are filled with a dense core of rough stones, mortar, and flint to absorb heavy impacts.
Key Architectural Elements:
Massive Dimensions: Typically built 20 to 40 feet high and up to 6 to 10 feet thick to withstand battering rams and projectiles.
Mural Towers: Round or square towers projecting outward from the wall at regular intervals to eliminate blind spots and provide flanking fire.
Battlements (Crenellations): The notched top of the wall featuring alternating solid sections (merlons) for cover and open gaps (crenels) for launching counter-attacks.
Wall-Walk (Chemin de Ronde): A protected stone pathway along the top of the wall allowing sentries to patrol and quickly shift defensive positions.
Hoardings or Machicolations: Wooden or stone overhanging galleries with floor openings used to drop rocks, boiling liquids, or arrows directly onto attackers at the base.
The Batter (Plinth): A sloped, thickened stone base that prevents undermining (digging) and causes dropped projectiles to ricochet outward into attackers.
Strategic and Defensive Functions:
Encirclement: It creates a continuous physical barrier around the inner ward, forcing attackers to channel through heavily fortified gatehouses.
Flanking Fire: The integration of projecting towers allows archers to shoot parallel to the wall, targeting enemies attempting to scale the curtain wall itself.
Compartmentalization: In concentric castles, an outer curtain wall mirrors an inner curtain wall, creating multiple layers of defense if the first perimeter falls.
Structural Materials: Constructed using a rubble-fill technique, where two parallel faces of dressed stone are filled with a dense core of rough stones, mortar, and flint to absorb heavy impacts.