Essex National Heritage Area - part of NPS

https://www.nps.gov/places/essex-national-heritage-area.htm

north shore area of boston

probably is staffed / managed by the NPS Regional Office in Boston

In 1996, the United States Congress recognized the national
significance of the historic 500-square-mile region north of Boston,
Massachusetts, by establishing the Essex National Heritage Area (Essex
NHA).Essex NHA covers 34 cities and towns and is managed by Essex
National Heritage Commission (Essex Heritage), a nonprofit
organization that rallies communities around promoting and enhancing
the unique character of Essex County.