of Social Studies (ISS) of Erasmus University Rotterdam Leiden University College The Hague Netherlands Institute of International Relations 'Clingendael' The Hague Academy of International Law The Hague University of Applied Sciences T.M.C. Asser Instituut In 1948, the Congress of Europe was held with 750 delegates from 26 European governments, providing them with the opportunity to discuss ideas about the development of European integration, which eventually cultivated into the creation of the modern-day European Union. Twin towns and sister cities The Hague is twinned with: Juigalpa, Nicaragua Nazareth, Israel Palembang, Indonesia Warsaw, Poland Economy The Hague has a service-oriented economy. Professional life in the city is dominated by the large number of civil servants and diplomats working in the city; , 26% of the jobs in The Hague are those offered by the Dutch government or the international institutions. Large employers in this sector include the ministries of Defence, Justice, Housing, Spatial Planning and the Environment, Foreign Affairs, the Ministry of the Interior and Kingdom Relations and Transport, Public Works and Water Management. Several large international businesses have their headquarters in The Hague, including Shell plc, the world's fifth largest company in terms of revenue. Other significant companies headquartered in The Hague include Aegon, APM Terminals, Damco, NIBC Bank, Chicago Bridge & Iron Company and PostNL. The city is also host to the regional headquarters of Siemens, T-Mobile, AT&T, Huawei, Kuwait Petroleum Corporation, McDermott International, Saudi Aramco, TotalEnergies and Worley (company). There has never been any large-scale industrial activity in The Hague, with the possible exception of the fishing activities of the harbour in Scheveningen. Many of the city's logistical and minor-industrial services are in the Binckhorst in the Laak district, which contains many sizeable warehouses. Tourism is an important sector in The Hague. The city is the second biggest Dutch tourist destination, after Amsterdam. In 2012, The Hague welcomed 1.2 million tourists (an increase of 80,000 compared to the previous year), half of whom came from abroad. The number of hotel nights in the city increased by 5%; in particular, visitors from neighbouring countries are finding their way to The Hague. Compared to 2011 Belgians booked 27% more hotel nights, while the Germans were good for 24% more hotel nights, and the French booked 20% more hotel nights. The 14% average increase in visits by foreign tourists more than compensated for the slight decrease of less than 1% by Dutch