People visit European institutions' buildings in Brussels during Open Day

People visit the conference room in the Justus Lipsius building of the Council of the European Union during the Open Day of the European institutions in Brussels, Belgium, May 4, 2019. The Open Day is a unique opportunity for the public to discover how the European institutions operate. Visitors have free access to the institutions' buildings and some special introductory activities. (Xinhua/Zheng Huansong)