The main idea behind the reconstruction of the Philharmonic was to restore the building — originally designed as a church — to its original form and simplicity. To achieve this clarity, the previous acoustic ceiling, heavy balcony, and side balcony were removed and replaced with minimalist elements that highlight the original structure of the church hall. The character of the space is now defined by clean lines and a restrained palette of materials and colors: wood, black, and white. The stark geometry is softened by lightweight acoustic canopies suspended from the ceiling. Within this minimalist setting, the original circular window of the church stands out more clearly and enhances the atmosphere of the interior.

The new balcony is a symmetrical wooden element introduced into the space with a simple and unobtrusive shape. Its addition has made for a more spacious entrance into the hall. The side balcony was replaced by a clean opening that can be used on special occasions. To support the acoustics, oval-shaped panels in varying angles and positions are suspended from the ceiling, maintaining both the visual sense and openness of the vaulted structure. The back wall features acoustic wooden cladding that reflects the verticality of the organ pipes.

All new elements added to the interior are made of wood. The original shape of the hall and the suspended acoustic panels remain white, while the surface of the walls is animated only by the shadows cast by the overhead panels. All recessed features — such as doors and windows — are painted black to allow the main architectural lines of the concert hall to take prominence.