Salamanca is well-known for being one of the wealthiest and exclusive areas of Madrid. The building has an impressive, solid facade and a roof-top terrace with a fantastic view of Madrid. Between the two main business districts of Colon and AZCA, the business centre is less than two miles from the city centre. Many embassies, ministries and banks are located nearby. Madrid is the third largest capital in Europe and, has the fourth largest GDP on the continent and is considered the major financial centre of Southern Europe. The city hosts the head offices of many major Spanish companies, including Banco Santander. As a major centre for international business and commerce, the city has seen recent rapid growth in the service sector.