Neoclassical plan with its axial “royal staircase”, atectonic façade and frieze, giant Egyptian-style door. By isolating the reading room from unnecessary visual contact with the environment and providing an even diffused light, Aalto creates perfect conditions for mental work. Natural light enters the rooms through evenly spaced round lights on the ceiling, creating an optimal reading environment. 57 holes with a height of 1.8 m were tapered. The height of the cone is such that a sunbeam incident at an angle of 52 ° and below cannot enter the building unhindered. The ceiling plays the role of a “sun”, the diffused light of which does not create a shadow. The sun rays enter the room not directly but through thousands of reflexes that receive various directions. Light-colored walls and ceilings also contribute to light scattering. The ceiling also serves as a heat source (thermal panel system).