Castle Williams

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Castle Williams
Governors Island, New York City
View from the Staten Island Ferry on New York Harbor
Type	Circular fort
Height	40 feet
Site information
Owner	Public - National Park Service
Controlled by	United States of America
Open to the public	Yes
Castle Williams
U.S. National Register of Historic Places
New York City Landmark No. 0547
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Coordinates	40°41′34″N 74°01′09″W / 40.69278°N 74.01917°W / 40.69278; -74.01917
Visitation	126,000 (2008)
NRHP reference No.	72000864
NYCL No.	0547
Significant dates
Added to NRHP	July 31, 1972[1]
Designated NYCL	September 19, 1967
Condition	Fair
Site history
Built	1807
Built by	Jonathan Williams
In use	1808-1840s
Materials	Sandstone, Granite, Brick

Castle Williams is a circular fortification of red sandstone on the northwest point of Governors Island, part of a system of forts designed and constructed in the early 19th century to protect New York City from naval attack. It is a prominent landmark in New York Harbor. Together with Fort Jay, it is managed by the National Park Service as part of Governors Island National Monument.