Huge tent roof for open-air concerts at the museum square, view of the cupola, Bonn, North Rhine-Westphalia, Germany, Europe

air architecture at bonn building buildings concert concerts cupola design europe european federal for frg german germany hall halls huge inboard indoor indoors inside interior internal museum north nrw of open open air photo republic rhine rhine westphalia rhine westphalian roof roofs square tent the view views westphalia westphalian