The Roman Catholic Archdiocese of New York covers New York, Bronx, and Richmond Counties in New York City (coterminous with the boroughs of Manhattan, the Bronx, and Staten Island, respectively), as well as Dutchess, Orange, Putnam, Rockland, Sullivan, Ulster, and Westchester counties in New York state. The Roman Catholic Archdiocese of New York is home to a large number of religious orders and congregations. Some of them arrived in the 19th century to serve various immigrant populations. As these groups became more assimilated, the congregations directed their efforts to various types of apostolates or other locations. While there are not as many religious communities present in 2007 as there were in 1957, they still make up a significant part of the archdiocese.