Castello 4 is a restaurant/bar with a total area of 2,200 square feet. The design starts from the center line of this space and used a bi-folding concept to create a symmetrical pattern in the shape of a vaulted ceiling, unusually designed with pillars in the shape of an inverted triangle. Designer aims to emphasize the height of the ceiling to create space illusion. The original finishing of the space is retained to minimize the construction cost; adding to it are the cement board pillars and rusty plates that match perfectly with the existing concrete walls, giving it a raw and authentic feel. Rusty screens with laser-cut triangular pattern are placed in front of the large windows to conceal the discordant views and the structure of the building facade, yet ensuring that the space is still illuminated by natural light.