The National Congress of Argentina is located in Buenos Aires and consists of a 72-seat Senate and 257-seat Chamber of Deputies. Surrounding the building are many significant works of art and monuments. The Casa Rosada is the official seat of the executive branch of the Argentine government and has served as a podium for important political figures. The Teatro Colón is one of the top five opera houses in the world due to its outstanding acoustics. Recoleta Cemetery is a prominent tourist attraction that contains the remains of many important figures in Argentine history.