 In Brussels, staff continued to be spread across a number of buildings, on the Rue Belliardstraat, Avenue de la Joyeuse Entrée/Blijde Inkomstlaan, Rue du Marais/Broekstraat and at Mont des Arts/Kunstberg.The first purpose-built building was the Berlaymont building in 1958, designed to house 3000 officials which soon proved too small, causing the institution to spread out across the neighbourhood.Yet, despite the agreement to host these institutions in Brussels, its formal status was still unclear, and hence the city sought to strengthen its hand with major investment in buildings and infrastructure (including the Brussels Metro