Castle Williams
| Castle Williams | |
|---|---|
| Governors Island, New York City | |
View from the Staten Island Ferry on New York Harbor | |
| Site information | |
| Type | Circular fort |
| Owner | Public - National Park Service |
| Controlled by | United States of America |
| Open to the public | Yes |
Castle Williams | |
| Coordinates | 40°41′34″N 74°01′09″W / 40.69278°N 74.01917°W |
| Visitation | 126,000 (2008) |
| NRHP reference No. | 72000864 |
| NYCL No. | 0547 |
| Significant dates | |
| Added to NRHP | July 31, 1972 |
| Designated NYCL | September 19, 1967 |
| Condition | Fair |
| Height | 40 feet |
| 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.