Duque de Caxias, is a city in southeast Brazil in Rio de Janeiro, bordered by Rio de Janeiro (city) to the south. Its population was 842,890 (2005) and its area is 465 km². Its current Mayor is José Camilo Zito. Although the city is the second richest in the State of Rio de Janeiro, it still has sewage rivers running right under domestic porches and balconies. It has important industries such as oil refinery and chemical. It is named after Luís Alves de Lima e Silva, Duke of Caxias, who was born there in 1803. The city is the seat of the Roman Catholic Diocese of Duque de Caxias.