Complex sentence: Its congregation was founded in 1809 in the notorious Five Points neighborhood by free Africans worshiping at Trinity Church, Wall Street as the Free African Church of St. Philip, and is the oldest black Episcopal parish in New York City.
Split into simpler sentences: Its congregation was founded in 1809 by free African Americans worshiping at Trinity Church, Wall Street as the Free African Church of St. Philip. First located in the notorious Five Points neighborhood, it is the oldest black Episcopal parish in New York City.