Photo taken on April 5, 2019 shows the Europa Building, the seat of the European Council and the Council of the European Union, in Brussels, Belgium. Brussels is the capital and the largest city of Belgium. It also enjoys the reputation of the "capital of the Europe", because it hosts a number of principal European Union (EU) institutions including European Council, European Commission, Council of the EU and a branch of the European Parliament. (Xinhua/Zheng Huansong)