22°54′19″S 43°10′38″W / -22.905392, -43.177128 (Downtown)) Centro (Downtown in American English or CBD in other English use) is the historic centre of the city, as well as its financial centre. Sites of interest include the Paço Imperial, built during colonial times to serve as a residence for the Portuguese governors of Brazil; many historic churches, such as the Candelária Church, the colonial Cathedral and the modern-style Rio de Janeiro Cathedral. Around the Cinelândia square there are several landmarks of the Belle Époque of Rio, such as the Municipal Theatre and the National Library building. Among its several museums, the Museu Nacional de Belas Artes (National Museum of Fine Arts) and the Museu Histórico Nacional (National Historical Museum) are the most important. Other important historical attractions in central Rio include its Passeio Público, an 18th century public garden, as well as the imposing arches of the Arcos da Lapa, a Roman-style aqueduct built around 1750. A bondinho (tram) leaves from a city center station, crosses the aqueduct (converted to a tram viaduct in 1896) and rambles through the hilly streets of the Santa Teresa neighbourhood nearby.
Downtown remains the heart of the city's business community. Some of the largest companies in Brazil have their head offices here, including Petrobras and Vale (formerly Companhia Vale do Rio Doce), the two largest Brazilian corporations.
