of the World Tourism Organization (WTO), belonging to the United Nations Organization (UN), the SEGIB and the Organization of Ibero-American States (OEI). It also hosts major international institutions regulators of Spanish: the Standing Committee of the Association of Spanish Language Academies, headquarters of the Royal Spanish Academy (RAE), the Cervantes Institute and theFoundation of Urgent Spanish (Fundéu). Madrid organizes fairs as FITUR, ARCO, SIMO TCI and the Cibeles Madrid Fashion Week.
While Madrid possesses a modern infrastructure, it has preserved the look and feel of many of its historic neighbourhoods and streets. Its landmarks include the Royal Palace of Madrid; the Teatro Real (Royal theatre) with its restored 1850 Opera House; the Buen Retiro Park, founded in 1631; the 19th-century National Library building (founded in 1712) containing some of Spain's historical archives; a large number of National museums, and the Golden Triangle of Art, located along the Paseo del Prado and comprising three art museums: Prado Museum, the Museo Nacional Centro de Arte Reina Sofía, a museum of modern art, and the Thyssen-Bornemisza Museum, which completes the shortcomings of the other two museums.
In the years the Cibeles Palace and Fountain have become the monument symbol of the city
