The national monument is in Lower Manhattan, near City Hall, not Harlem. The historic burial ground was much larger than the visible memorial. Its boundaries and the city's later development are therefore part of the story: the modern streetscape can conceal a landscape that once lay outside the colonial town.
NPS describes a burial place used by enslaved and free Africans during the seventeenth and eighteenth centuries. Legal restrictions shaped burial practices as well as everyday life. The site challenges any account that treats slavery as distant from New York's formation.
Calling it more than a memorial does not diminish its sacred role. It means that the present place also records a modern struggle over the treatment of ancestors and the responsibilities of research. Archaeological knowledge and respectful commemoration were not automatically aligned. Community participation helped determine how they would be brought together.