"Cannon Firing" by NPS Photo , public domain
BrochureCastillo de San Marcos |
Official brochure of Castillo de San Marcos National Monument (NM) in Florida. Published by the National Park Service (NPS).
featured in
![]() | National Parks Pocket Maps | ![]() |
![]() | Florida Pocket Maps | ![]() |
B
National Park Service
U.S. Department of the Interior
eginning in the 1500s, many European powers,
including Spain, France, and Great Britain, were
fighting for control in the New World. With wealthy
trade and territory at stake, how could they defend
their colonial outposts from enemy attack?
the stone fort that stands today, preserved as part of
Castillo de San Marcos National Monument. From
its first stones to its later massive walls, Castillo de
San Marcos was constructed between 1672 and 1695.
Once completed, this structure never fell in battle.
After the English overran and burned
St. Augustine in 1702, the Spanish built
a wall around the city. Originally, the
Cubo Line was an earthen bank, fronted by sharp yucca plants, that stretched
from the fort a half mile west to the
San Sebastian River. In 1808 the walls
were upgraded to include palm logs
and a 40-foot-wide moat on the north
side. West of the city gate, three artillery redoubts (a type of fortification)
provided additional protection.
Across the road to
the east is the city
gate.
Glacis The sloping embankment
around the fort protected the
lower walls from enemy fire.
Sentry Box
This small tower
sheltered guards
during their watch.
Past the moat is the glacis, a sloping
embankment around the fort that protected the lower walls from enemy fire.
Between the glacis and the moat is the
covered (covert) way, where defending
soldiers could move safely around the
exterior.
City gate
St. Augustine Founded in 1565,
this Spanish city was a rich melting
pot of cultures. Europeans, Native
Americans, and Africans lived and
worked here, bringing their customs
and traditions to the city.
Outdoor Exhibits Look
for these informational signs
around the park and inside
the Castillo.
Cubo Line After the English overran and
burned St. Augustine in 1702, the Spanish built
a wall around the city. Originally, the Cubo Line
was an earthen bank, fronted by sharp yucca
plants, that stretched from the fort a half mile
west to the San Sebastian River. In 1808 the walls
were upgraded to include palm logs and a
40-foot-wide moat on the north side. West of
the city gate, three artillery redoubts (a type of
fortification) provided additional protection.
City Gate Beginning in 1739,
people entered St. Augustine
through a wooden gate. These
stone pillars were constructed in
1808 as part of a major upgrade
of the town’s walled defenses.
Moat
4
Bell
On the northeast corner
tower
of the fort is a bell
tower.
Never fully completed,
the ravelin shielded the
entrance from attack.
There is another drawbridge leading into the
fort through the sally
port from the ravelin.
Ravelin Never fully
completed, the ravelin
shielded the entrance
from attack.
Covered way
Explore the Castillo Buy tickets at the entrance
station, then head into the Castillo through the
sally port. Your tour is self-guiding, so go at your
own pace. We recommend at least two hours.
Programs are scheduled throughout the day.
1
Matanzas Bay
Drawbridge
Drawbridge
You enter the fort to the left
of the entrance station. There
is a drawbridge leading to
the ravelin.
Entrance
Station
Glacis
Some rooms are historically furnished to recreate
their original purpose. Others now house museum
exhibits or serve as administrative offices or facilities like restrooms. Download the NPS App for
more options to explore the Castillo and grounds.
Accessible
route
There is an accessible route
that leads to the entrance station from the parking lot.
The Castillo is little changed from the time it was
built. Surfaces are uneven and can be slippery. Do
not sit, stand, or climb on walls or cannons. Federal laws protect all features. Using remotely piloted
aircraft like drones is prohibited. For complete
safety information and regulations, including
firearms, visit the park website.
Parking Paid parking is available in
the lot in front of the Castillo and the
public parking garage located one
block northwest of the fort at 1
Cordova Street.
Paid parking is available in the lot in
front of the Castillo and the public
parking garage located one block
northwest of the fort at 1
Cordova Street.
Features Inside Castillo de San Marcos
Enjoy reenactments like this
cannon-firing demonstration.
1 Sally Port The drawbridge
leads to the sally port, the fort’s
only entrance and exit. The 14foot-thick walls give a sense of
the fort’s strength.
•
2 Guard Rooms Spanish
soldiers lived in town with their
families unless on guard duty.
During their 24-hour rotation,
guards occupied these quarters.
•
3 Museum Exhibits Explore
over 450 years of history in the
exhibit rooms: Florida’s origins,
fort design and construction,
everyday life in the fort and city,
and the Castillo’s preservation.
•
4 Storage Rooms Food,
tools, and other items were kept
safe and dry here. As a remote
outpost, St. Augustine depended
on supplies from the Castillo,
especially in time of siege.
•
ALL IMAGES—NPS EXCEPT CANNON
FIRING— © DAWNA MOORE; SALLY
PORT— © TORE BERG
Water Battery In 1842 US
Army engineers filled the east
side of the moat with earth to
create a battery of cannons
along the water.
structures at each corner
labeled bastions.
Moat
8/26/22
IGPO:2025—431-026/84160 Last updated 2025
On the outer east side of the
fort is a hot shot furnace. and
water battery. In 1842 US Army
engineers filled the east side of
the moat with earth to create a
battery of cannons along the
water.
Hot shot
furnace
2
3
Mailing address:
Castillo de San Marcos
National Monument
1 S. Castillo Dr.
St. Augustine,
FL 32084 1
npf_white.pdf
904-829-6506
www.nps.gov/casa
Join the park community.
www.nationalparks.org
Inside the fort there is a
courtyard surrounded by
rooms including the guard
rooms, museum exhibits,
storage rooms, and theater
5 room. To the right there are
restrooms and stairs leading
up to the terreplein.
Stairs
Courtyard
The fort is a rectangular strucTerreplein ture with triangular shaped
Glacis
Crosswalk An accessible
route leads into the fort
from the parking area.
Theater
room
Surrounding the fort is a
moat. Mostly dry, the moat
had no resident alligators,
but domestic animals were
kept here in time of siege.
Bastion
Castillo de San Marcos
More Information Castillo de San
Marcos National Monument is one
of over 430 parks in the National
Park System. To learn more about
national parks, visit www.nps.gov.
Covered way
On the northwest
corner of the fort is a
sentry box. This small
tower sheltered guards
during their watch.
Moat Mostly dry, the moat
had no resident alligators,
but domestic animals were
kept here in time of siege.
Tour the Castillo The fort is open
daily, year-round, except Thanksgiving and December 25. There is an
entrance fee.
Accessibility We strive to make
facilities, services, and programs
accessible to all. For information
ask a ranger, call, check the park
website, or download the NPS App.
Covered Way Between the glacis and
the moat is the covered (covert) way,
where defending soldiers could move
safely around the exterior.
Spain’s Coat of Arms This coat
of arms represents Spain’s united
kingdoms: Castile (castle) and León
(lion). The original coat of arms was
placed on the fort in 1756.
Castillo de San Marcos
National Monument
Florida
In 1565 Spain established St. Augustine to protect
its Gulf Stream shipping route and anchor its claim to
La Florida (roughly today’s Florida and parts of surrounding states). By the late 1600s, British colonies
encroaching from the north threatened the city. The
Spanish built nine wooden forts before constructing
5 Meet the People Spanish
and other Europeans, Native
Americans, and Africans have
passed through St. Augustine.
Exhibits share some of the history
of these cultural intersections.
•
There is a wall to the right of
the fort bordering Matanzas
Bay. In the bay is a living seawall. Built in 2011, the “living”
seawall protects the historic
wall and provides habitat for
marine life. With today’s rising
water levels, this submerged
structure is more important
than ever.
Living Seawall Built in 2011,
the “living” seawall protects the
historic wall and provides habitat
for marine life. With today’s rising
water levels, this submerged structure is more important than ever.
12:34 PM
Castillo de San Marcos
“Although I have seen many castillos of consequence and reputation,” La Florida’s governor
said to Spain’s king in 1675, “this one is not surpassed by any of those with greater character.”
But could Castillo de San Marcos withstand an
enemy attack?
English forces from the Carolina colony made a
preemptive strike on St. Augustine by land and
sea. They quickly overtook the Spanish city and its
surrounding outposts.
supplies and bombarding the walls. The Castillo’s
coquina-stone walls held, absorbing the cannon
fire instead of shattering. By the end of December,
Spanish reinforcements arrived from Havana,
Cuba, and the outnumbered English burned St.
Augustine to the ground in their retreat. The Spanish rebuilt the city and added earthwork defenses.
Around 1,500 Spanish civilians and soldiers were
already secured in the Castillo with two months of
provisions. For several weeks, the English laid
siege and attempted to gain entrance, cutting off
A few years after its 1695 completion, European
nations were again at war, and the colonies were
dragged into the conflict. In November 1702
St. Augustine
Castillo de San Marcos
Fort Mose
Fort Matanzas
St. Augustine under British rule, 1764 LIBRARY OF CONGRESS
r
ive
sR
a
z
an
Mat
s
Matanza
In 1740 the Castillo again fended off the English
when British Gen. James Oglethorpe besieged
the town for over a month, before giving up and
returning to the Georgia colony. When the British
finally took possession of Florida in 1763, it was
through political negotiation, not by force.
r
Rive
Protecting St. Augustine
© PETER DUTTON
Present Day Volunteer reenactors bring
the Castillo to life when demonstrating
historical crafts, foods, medicines, tools,
and weapons.
HARGRETT RARE BOOK AND MANUSCRIPT LIBRARY /
UNIVERSITY OF GEORGIA LIBRARIES
Anastasia Island
1875 The US Army brings Native peoples
from Plains and Apache Tribes to Fort
Marion, pressuring them to adopt Christianity
and learn the English language. Some record
the experience in ledger drawings (below).
Atlantic Ocean
© DR. HERMAN VIOLA
© GERARDO AMECHAZURRA
Coquina shells
Timucua Spanish arriving in the
1500s encounter the Timucua
people who live throughout
northeast Florida, including the
coastal village of Seloy where
Pedro Menéndez de Aviles lands.
NPS / BETSY EHRLICH
Coquina stone
NPS / BETSY EHRLICH
Coquina Stone The Castillo is
made out of cut coquina stone—
tiny seashells compressed into
limestone over thousands of
years. Locally quarried and easy
to cut, coquina was suitable for
military construction and withstood cannon fire. It has helped
the Castillo stand for 350 years.
Cut stone walls
1565 Menédez establishes
St. Augustine on a defensible
harbor. Warfare quickly ensues
with French Protestants at Fort
Caroline and the Matanzas Inlet.
1586 English forces
under Sir Francis Drake
attack and burn St.
Augustine.
Spanish
soldier
NPS / DAVID W. RICKMAN
1702 The Castillo is a
refuge for the Spanish
during a 51-day siege
of St. Augustine. The
retreating English forces
burn the city (above).
1740 The Castillo withstands Oglethorpe’s 37-day
siege. To defend against a
southern approach to the
city, construction begins on
Fort Matanzas (above).
NPS / STEVEN N. PATRICIA
NPS
1893 Reinforced seawalls support
iron gun platforms (below). Artillery
in the water battery could threaten
ships miles away.
1830s Osceola (right) leads
the Seminoles in armed
resistance against USforced relocation. Some,
including Osceola, are held
at Fort Marion; others
escape to the swamps.
1942–45 US Coast Guard graduation
ceremonies at Fort Marion. NPS
1924 Forts Matanzas and Marion
(Castillo de San Marcos) are proclaimed
national monuments. In 1933 both are
transferred from the War Department
to the National Park Service.
NPS / DAVID W. RICKMAN
Left: Timucuan stone projectile point
Right: Fish bone hairpin or needle
CITY OF ST. AUGUSTINE
COURTESY CITY OF ST. AUGUSTINE ARCHEOLOGY
1500s
Spain claims southern and western North America.
France claims Canada.
Late 1500s
England aims to colonize
eastern North America.
1565 The Spanish
build the first of nine
wooden forts to defend
St. Augustine.
timeline
1500
1619
First enslaved Africans
are brought to Virginia.
1672–95 The Spanish build Castillo
de San Marcos to protect St.
Augustine. The moat, quarters,
bastions, ravelin, and seawall are
finished by 1695.
1600
1513 Juan Ponce de León’s
exploration leads Spain to
claim Florida.
1564 French Protestants
(Huguenots) establish Fort
Caroline about 40 miles
north of St. Augustine on
land claimed by Spain.
Trade Routes For a time, Spain
was the dominant European
power in the New World. Trade,
an important source of wealth,
had to be protected at all costs.
St. Augustine was an ideal location
to defend the Gulf Stream route.
As England and France encroached
from the north, Castillo de San
Marcos symbolized Spain’s military
strength and readiness to fight.
NPS / STEVEN N. PATRICIA
1756−63
1701–14
War of the
Spanish Succession
1704–19 Defensive earthworks
are built north
and west of St.
Augustine.
Seven
Years’ War
1740s–50s The Castillo is strengthened
with curtain walls,
bombproof rooms,
and a larger ravelin.
1700
1670 The English encroach on
Spanish claims, establishing
Charles Towne (Charleston)
and the Carolina colony.
NPS
1763 A treaty gives Spanish
Florida to Great Britain. The
Spanish and a few remaining
Timucua leave St. Augustine
for Cuba.
Galleon Nothing represents the
golden age of Spanish trade like
the galleon. This multi-deck sailing
ship was designed for speedy cargo
hauls and could be outfitted for
warfare.
1775−83
American
Revolutionary War
1763 The British take
over Florida and change
the Castillo’s name to
Fort St. Mark.
1821
US ratifies Florida
cession from Spain.
1825 Under US
control, the
Castillo is named
Fort Marion.
1800
1783 A treaty resulting from the
American Revolution returns Florida
to Spain, but Spanish colonialism—
and the Castillo itself—are in decline.
1861−65
US Civil War
1898
1914–18
SpanishWorld War I
American War
1861–62 Confederate 1895 Florida’s first golf
forces occupy Fort
course is installed on
Marion.
Fort Marion’s grounds.
1900
1939–45
World War II
1964
Civil Rights Act
1942–45 Fort Marion and
much of St. Augustine is
used as a US Coast Guard
training base.
Present Castillo de San Marcos National
Monument—site of the oldest masonry
fort in the continental United States—
recalls the beginnings of European
ventures into new worlds.
2000
FLAGS—WIKIMEDIA COMMONS
UNLESS OTHERWISE CREDITED
The Castillo’s bell
tower looks over
Matanzas Bay.
NPS / BETSY EHRLICH