forts fortifications

North west aspect of the Citidel etc. (Halifax) 1781.

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Prairie du Chien, Wisconsin in 1830.

Athanasius Kircher - Arx Babylonica à Semiramide, exstructa.

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The Flag Bastion, Fort Ticonderoga, N.Y.

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Old Fort and Harbor, Mackinac Island, Mich.

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The citdel of Saida, the ancient Sidon. Now called Kul'at el Mezzeh. I...

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Pagus Hispanorum in Florida.

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La citadelle Laferriere, vue prise au pied des murailles. (page 33)

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Plymouth Colony 1622, Plymouth, Mass., Vintage Postcard by Detroit Pub...

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Fort Frederick.

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This description and plan of the Battery, and Old Fort George in the c...

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Slave Markt

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Sketch of the burning & destroying of Castle William in Boston Harbour

Storming of the Byrsa, Carthage

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The Old Fort and First Meeting House, 1621, Plymouth, Mass.

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W. H. William Henry Bartlett - Fort Chambly.

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View of the ruins of Ticonderoga forts on Lake Champlain.

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The king before a besieged castle -- the battering-ram making a breach...

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Group of Cheyenne and Arapahoe Indians in natural costume, confined in...

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Fort of Killeh Abdooleh. Troopers of the Auchukzye horse.

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Lahore Gate, entrance to the fort at Delhi.

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The Pearl Mosque inside the fort at Agra

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John Ogilby - Het Fort Oranje en Nassou opt Eiland Goeree.

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Fort Niagara, N.Y.: Plan of Fort Niagara with its environ.

Citadel of Sidon, The Holy land, Syria...

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South view of the Old Spanish Fort, showing the draw bridge. St. Augus...

Florida stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

The Lock on the dungeon door of the Old Spanish Fort, at St. Augustine...

Florida stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

[Group of the 3 most celebrated Indian Chiefs and 2 women prisoners.]

Florida stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

Watch Tower of Old Fort San Marco.

Florida stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

The Archway of Fort Marion, St. Augustine.

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Stairway in the Old Spanish Fort, at St. Augustine, Florida.

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Entrance to the Old Spanish Fort, at St. Augustine, Florida.

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Group of Kiowa and Caddoe [sic] Indians, in native costume, confined i...

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The Entrance to the Old Spanish Fort, at St. Augustine, Florida.

Florida stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

Old Fort San Marco. Florida Sterescope Cards Collection, NYPL.

Florida stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

Group of Cheyenne and Arapahoe Indians in natural costume, confined in...

Picryl description: Public domain image of a 19th century fashion, costume design, free to use, no copyright restrictions.

St. Augustine, from Fort Marion. Florida Sterescope Cards Collection, ...

Florida stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

Dungeon, from which Wildcat, the Seminole Chief escaped from Fort Mari...

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Fort Pulaski. Collection of Georgia Sterescope Cards

Georgia stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

Section of Fort Pulaski. Collection of Georgia Sterescope Cards

Georgia stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

Fort Niagara taken from the British side of the River at Newark, 1814.

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Fort McHenry &c. Baltimore Maryland. 19th century stereoscope card.

Maryland stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More

Fort Point, from the West side.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Spanish Coat of Arms. Ft. Marion, St. Augustine, Florida.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Door way. Fort Marion. Florida Sterescope Cards Collection, NYPL.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

The Door way of the Fort, showing the old Spanish Coat of Arms over th...

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Stairway in the Old Spanish Fort at St. Augustine, Florida.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Southwest view of Fort San Marco.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Old St. Marks Fort, St. Augustine, Florida.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Doorway of the Old Spanish Fort, San Marco.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Interior. Old Spanish Fort, St. Augustine, Florida.

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View from Look-out Tower. Fort Marion, St. Augustine.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Watch Tower of the Old Spanish Fort, at St. Augustine, Florida.

Picryl description: Public domain image from Robert Dennis collection of stereoscopic prints, free to use, no copyright restrictions.

Stairway in the Old Spanish Fort, at St. Augustine, Florida.

Picryl description: Public domain image from Robert Dennis collection of stereoscopic prints, free to use, no copyright restrictions.

St. Augustine, from Fort Marion. Florida Sterescope Cards Collection, ...

Florida stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

Section. Fort Marion, Looking east. St. Augustine, Fla.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Fort Marion, (east point) showing parapet walls and sentry box. St. Au...

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Stage fort. Gloucester MA. Stereoscope card, 19th century.

Massachusetts stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker wh... More

Ft. Mackinac. 19th century. Stereoscope card.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

The 30 lb. [...] parrot guns that shelled Charleston from Morris Islan...

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[Fort Sumter, 1861.] Stereoscope card of Charleston SC.

Fort Sumter, 1861. Stereoscope card of Charleston SC.

Fort Sumter, 1865. Stereoscope card of Charleston SC.

Interior of Fort Sumpter [Sumter]. James Island in the distance.

North Carolina stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker w... More

Fort Johnson, James Island. Fort Sumpter [Sumter] in the distance

North Carolina stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker w... More

Ruins old Spanish fort preserved by the Martyr Tree.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

The figure of the Indian's fort or Palizado in New England

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Fort de Sans-Souci, à Haiti.

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The tower of David, The Holy land, Syria...

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General view of Elmina.

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View of Fort George with the City of New York from the SW

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View entitled Indians of North America. Sterescope Card.

Arizona Stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

Oil painting marine, off Governor's Island, with view of the Fort, rac...

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Canaletto - La Torre di Malghera

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Fort Point and Golden Gate, San Francisco, Cal.

California Stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who a... More

Fort d'Elmina (anglais), sur la Côte-d'Or. (D'après une aquarelle inéd...

Public domain image from the Schomburg Center for Research in Black Culture in Harlem, 19th century, free to use, no copyright restrictions image - Picryl description. The Schomburg Center for Research in Black... More

Casement where J. Davis was Imprisoned, Fortress Monroe, Va.

Public domain photo of vintage Virginia postcard, 19th century, free to use, no copyright restrictions image - Picryl description.

Group of the 3 most celebrated Indian Chiefs and 2 women prisoners.

Florida stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

Old Spanish Fort, built 1620. St. Augustine, Fla.

Florida stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

Stairway of Fort San Marco. Florida Sterescope Cards Collection, NYPL.

Florida stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

The Chapel and Dungeon doors, Fort Marion, St. Augustine.

Florida stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

Stairway at Fort Marion. St. Augustine.

Picryl description: Public domain image of a church, crypt, chamber, underground vault architecture, free to use, no copyright restrictions.

Old Fort San Marco. Florida Sterescope Cards Collection, NYPL.

Florida stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

Water battery and hot shot furnace of the Old Spanish Fort, at St. Aug...

Florida stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

Group of Kiowa and Caddoe [sic] Indians, in native costume, confined i...

Picryl description: Public domain image of a 19th century fashion, costume design, free to use, no copyright restrictions.

Interior of Ft. Mackinac. 19th century.

Michigan stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More

Ruins at Crown Point, Officer's Quarters.

Public domain image related to an industrial revolution, industry history, factory building, 19th century, free to use, no copyright restrictions image - Picryl description.

Fort Sumter in 1872. Stereoscope card of Charleston SC.

North Carolina stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker w... More

The 30 lb. [...] parrot guns that shelled Charleston from Morris Islan...

Picryl description: Public domain image of a cannon, artillery gun, free to use, no copyright restrictions.

Fort Sumpter [Sumter], Charleston Harbor. Stereoscope card of Charlest...

North Carolina stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker w... More

Fort Sumpter [Sumter] from the Bar. Charleston, S.C.

North Carolina stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker w... More

Fort Johnson, James Island. Fort Sumpter [Sumter] in the distance

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Interior of Fort Moultrie. Battery "B" and group of palmette trees in ...

North Carolina stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker w... More

Fort Sumter. Stereoscope card of Charleston SC.

North Carolina stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker w... More

Castle William, Governor's Island. New York

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Fort Point and Golden Gate, San Francisco, Cal.

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Fort Point, East side. Sterescope Cards NYPL Collection.

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Watch Tower, Ft. Marion, St. Augustine, Fla.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

The Dungeon in the Old Spanish Fort, from which, Wild Cat, a celeberat...

Picryl description: Public domain image from Robert Dennis collection of stereoscopic prints, free to use, no copyright restrictions.