Neue Messe exhibition centre glass hall hall sky cloud water nature reflection Conference Centre building buildings Centres Center Centers Architecture structure structures meeting building event building trade fair trade fairs pavilion geography Europe western europe central europe Germany Eastern Germany Saxony Leipzig person background people people in the background day outdoor outside outdoor shots outdoor shot outdoors building exterior exterior exterior view external horizontal horizontal format color coloured colored colors colours photograph photo images image photographs photos clouds reflections Centre pavillion continent continents Europa FRG human humans people persons days dayshot dayshots colour