The project involves the radical renovation of the office building initially designed by Alexandros Tombazis (1972), a rare example of brutalist architecture in Greece. The first intervention resurfaced bare concrete in all the architectural components that had been clad or faced during the 50 years of the building’s operation. However, the interior did not revive its original image: Drastic interior rearrangements conform to the grid and dimensions of the module in the waffle roof slab, whose geometry was highlighted with the removal of all appliances or plasterboard cladding. The main intervention was the introduction of a functional access line, horizontally with seamless water surfaces and vertically with consecutive marble panels, integrating the main staircase. Earthen materials and clear, minimalist lines underscore the building’s brutalist elements by contrast. The architectural treatment of the facades is discreet, to showcase the character and overall concept of the building.