St. Patrick's Old Cathedral is the oldest Catholic church in New York City, located at 260-264 Mulberry Street in the Nolita neighborhood of Manhattan. It was built from 1809 to 1815 and served as the seat of the Roman Catholic Archdiocese of New York until 1879, when the current St. Patrick's Cathedral opened. In 1966, it was declared a New York City landmark, and it was declared a minor basilica in 2010.