overview programme O2 universum will serve as a modern multifunctional center for holding large international congresses and corporate events. O2 universum will offer up to 38 halls of various sizes with a total capacity of 10,000 visitors. The largest hall with a capacity of up to 4.5 thousand people will also be used as a venue for medium-sized concerts and sports matches. large events Volbeat 5. 10. 2025, 19:00 O2 universum large events Calum Scott 28. 10. 2025, 20:00 O2 universum large events Jamie Cullum 12. 11. 2025, 20:00 O2 universum large events ZAZ 27. 1. 2026, 20:00 O2 universum festivals Comic-Con 13. 3. 2026 — 15. 3. 2026 O2 universum