exterior view of the ioannis vellidis convention center (vellidio) in thessaloniki, greece.

telecommunications international mediterranean thessaloniki architecture thessalonica photography sightseeing thesaloniki convention background exhibition television editorial landscape macedonia makedonia structure wallpaper exterior vellidis vellidio capacity backdrop salonica salonika saloniki ioannis largest central helexpo stratou velidio website center greece people avenue banner facade pirgos pyrgos thrace greek tower trade white view 2400 blue fair ote sky web