The Hologram of Europe in Ljubljana consists of 34 stone pillars shaped into four circles with a common centre. A cosmogram is chiselled into each pillar. 27 pillars represent EU member states, 6 represent EU memberstates to be and 1 pillar represents Ljubljana, as the host city. The author of the Hologram was Marko Pogačnik; the Hologram was built in may 2008 during the Slovenian EU presidency.