Announcement: September 12, 2014. Zagreb Architecture Association launched the 3rd Zagreb Architecture Days - a manifestation that through 6 days program promotes and celebrates architectural realizations in the city of Zagreb, this year with a special accent to Zagreb as a European city. Alan Leo Plestina, on a behalf of UPI-2M author team presented the story on creating and building the multifunctional hall Arena Zagreb. Participants had an opportunity also to visit and being introduced with the significant buildings in Zagreb and speak on details with their authors.