Newburyport Harbor Light
Encyclopedia
Newburyport Harbor Light, also known as Plum Island Light, built in 1788, is a historic lighthouse
Lighthouse
A lighthouse is a tower, building, or other type of structure designed to emit light from a system of lamps and lenses or, in older times, from a fire, and used as an aid to navigation for maritime pilots at sea or on inland waterways....

 on Northern Boulevard in Newburyport, Massachusetts
Newburyport, Massachusetts
Newburyport is a small coastal city in Essex County, Massachusetts, United States, 35 miles northeast of Boston. The population was 21,189 at the 2000 census. A historic seaport with a vibrant tourism industry, Newburyport includes part of Plum Island...

.

The original 4th order Fresnel lens
Fresnel lens
A Fresnel lens is a type of lens originally developed by French physicist Augustin-Jean Fresnel for lighthouses.The design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional design...

 is still in use, one of only five original glass Fresnel lenses still in use in Massachusetts.

The light is now owned by the City of Newburyport and is leased to the Friends of Plum Island Light.

It was added to the National Register of Historic Places
National Register of Historic Places
The National Register of Historic Places is the United States government's official list of districts, sites, buildings, structures, and objects deemed worthy of preservation...

as Newburyport Harbor Light on June 15, 1987, reference number 87001485.

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