A spacious corridor surrounding Centennial Hall’s main auditorium is referred to as lobbies. It covers 4024 square meters and is 5 meter wide. It provides a free communication route during events with the number of spectators reaching 10 000. Lobbies provide excellent exhibition space during fairs, congresses and conferences, and recesses they hold may be adapted to hold catering zones and coffee breaks. Evenly distributed skylights ensure access of daylight. Two drive-in access doors facilitating entry of over-size loads lead to the corridor: dimensions: 1) 4.33 m x 4.20 m, 2) 4.29 m x 4.20 m, maximum height of the loads: 3.5 m).