The city of Strasbourg in France is the official seat of the European Parliament. The institution is legally bound by the decision of Edinburgh European Council of 11 and 12 December 1992 and Article 341 of the TFEU to meet there twelve times a year for a session, each of which usually takes about four days. The majority of work, however, takes place in Brussels, and some other work is undertaken in Luxembourg City (see Location of European Union institutions for more information). Also all votes of the European Parliament must take place in Strasbourg. "Additional" sessions and committees take place in Brussels. Although de facto a majority of the Parliament's work is now geared to its Brussels site, it is legally bound to keep Strasbourg as its official home; a situation which garners much criticism from the European Parliament itself, as well as many interest groups, administrative staff, and environmentalist groups amongst others. The Parliament's five buildings, all named after distinguished European politicians, are located in the Quartier Européen (European Quarter) of the city, which it shares with other European organisations which are separate from the European Union's. Previously the Parliament used to share the same assembly room as the Council of Europe. Today, the principal building is the Louise Weiss building, inaugurated in 1999 and named after the women's rights activist and former MEP, Louise Weiss. Principal building The Louise Weiss building (IPE 4) (named after Louise Weiss, a French former member of the parliament), is located in the Wacken district of Strasbourg, south of Schiltigheim, between the 1920s workers' suburban colony (Cité ouvrière) Cité Ungemach and the 1950s buildings of the Strasbourg fair, some of which had to be torn down to make way for the Immeuble du Parlement européen 4, its formal name. Built at a cost of 3.1 billion French francs (470 million euros) at the intersection of the Ill and the Marne-Rhine Canal, it houses the hemicycle for plenary sessions, the largest of any European institution (750 seats – expanded to 785 – for MEPs and 680 for visitors), 18 other assembly rooms as well as a total of 1,133 parliamentary offices. Through a covered footbridge over the Ill, the Louise Weiss communicates with the Winston Churchill and Salvador de Madariaga buildings. With its surface of 220,000m² and its distinctive 60m tower, it is one of the biggest and most visible buildings of Strasbourg.