Fortress
The Castillo de San Marcos National Monument in St. Augustine, Florida, is the oldest masonry fort in the continental United States, constructed by the Spanish between 1672 and 1695 to defend the city and protect Spain’s interests in the region.
Built from coquina, a unique shellstone material, its star-shaped design made it highly resistant to cannon fire and sieges. The fort never fell to enemy forces despite multiple attacks by the British in the early 18th century. Throughout its history, it served variously as a Spanish, British, and American military post, and later as a prison, notably incarcerating Native American leaders during conflicts known as the Seminole Wars.
The fort was renamed Fort Marion during American control but had its original name restored in 1942. Decommissioned in 1933, it became a National Monument in 1924 and is now managed by the National Park Service, serving as a prominent historical site that preserves the colonial and military history of St. Augustine and early America.
| Address | 11 S Castillo Dr, St. Augustine, FL 32084, United States |
| Architects | Ignacio Daza, Pedro Ruiz de Olano |
| Opened | 1695 |
| Area | 8 ha |
| Architectural Style | Spanish Colonial architecture |
| Built | 1672–1695 |
| Phone | +1 904-829-6506 |
Castillo de San Marcos National Monument is located in Florida, United States.
Castillo de San Marcos National Monument is situated in the state of Florida.
The main phone number for the Castillo de San Marcos National Monument is +1 904-829-6506.
The address of Castillo de San Marcos National Monument is 11 S Castillo Dr, St. Augustine, FL 32084, United States.
Yes, Castillo de San Marcos National Monument is family-friendly and attracts visitors of all age groups.
Visitors usually spend a few hours to a full day exploring Castillo de San Marcos National Monument.
Yes, there are several hotels and accommodations near Castillo de San Marcos National Monument in Florida.
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