In the first half of the 20th century, St. Paul’s Church in Greenville, Jersey City, was perhaps the largest parish in the Roman Catholic Archdiocese of Newark. It grew so much that it was split in 1963 to form Our Lady of Mercy Church in Country Village on the other side of the Boulevard. Its parish school enrolled almost 2,000 students with over 30 Dominican Sisters of Newburgh (now Hope) living in the convent across the street. By 2003 when the school closed, a handful of nuns remained until it was vacant. New life came in 2015 when Magnificat Homes opened its second location there housing …