Wall Pieces must be placed along the streets of the board according to the shape indicated by the Building Die. This shape can be both mirrored and rotated.
Wall Pieces can be placed in any free street (not already occupied by another Wall Piece). It is not mandatory to place them contiguously with other already placed Wall Pieces.
Wall Pieces can be placed on the external perimeter of the board, however, Wall Pieces cannot be placed outside the board.
A player can choose to place a single Wall Piece rather than the Wall Pieces indicated by the Building Die.
Players place their Wall Pieces simultaneously. Don't look at other players' boards until you have placed your own Wall Pieces.