Institutional seats of the European Union are based in Luxembourg City along with the European Investment Bank. The Economic and Social Committee and the Committee of the Regions are entirely based in Brussels while the European Central Bank is based in Frankfurt and Europol is the only agency to have its seat fixed by the treaties, in The Hague. Separately, the Treaty of Nice establishes Brussels as the venue for all formal summits of the European Council after 2004. However some extraordinary sessions are sometimes held outside the city. The European Council's seat is however fixed by a declaration rather than a protocol, meaning it is
Headquarters of the Bank of the Argentine Nation Headquarters of the Bank of the Argentine Nation The Headquarters of the Bank of the Argentine Nation (), more often referred locally as "Banco Nación Casa Central", is a monumental bank building next to the Plaza de Mayo, founding site of Buenos Aires and host of major events in the history of the country. Designed by renowned Argentine architect Alejandro Bustillo in a Neoclassical style with French influences, the building occupies an entire city block and was inaugurated in 1944. With a dome in diameter, the building is a National Historic Landmark. The headquarters are located in the San Nicolás