In 2018, the city proper had 284,677 inhabitants and both the Eurométropole de Strasbourg (Greater Strasbourg) and the Arrondissement of Strasbourg had 500,510 inhabitants. Strasbourg's metropolitan area had a population of 790,087 in 2017 (not counting the section across the border in Germany), making it the ninth-largest metro area in France and home to 13% of the Grand Est region's inhabitants. The transnational Eurodistrict Strasbourg-Ortenau had a population of 958,421 inhabitants. Strasbourg is one of the "de facto" four main capitals of the European Union (alongside Brussels, Luxembourg and Frankfurt), as it is the seat of several European institutions, such as the European Parliament, the Eurocorps and the European Ombudsman of the European Union. An organization separate from the European Union, the Council of Europe (with its European Court of Human Rights, its European Directorate for the Quality of Medicines most commonly known in French as "Pharmacopée Européenne", and its European Audiovisual Observatory) is also located in the city.