ADVERTISEMENT Built of stone, with relief styles on the walls and an impressive floor, the World Centre for Circular Economy and Culture is a unique example of post-war architecture. Established in 1959 from designs by the architect Petros Pikionis, the "Pi" Pavillion is considered one of the most beautiful balconies of Delphi, lying just a few hundred metres from the picturesque village. There, as soon as the sun sets, its famous garden of " Pi " comes alive.* Ancient faces, letters and words