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Dalhousie Gate of Citadelle of Quebec, Quebec City, Canada
The Palace of the Prince-Bishops is a historic building situated on the Place Saint-Lambert in the centre of Liege, Belgium
Aerial view of Fort Chambly during sunset summer by the Richelieu river
Huge complex with high thick stone walls at Charlemont fortress on hill, against blue sky background, surrounded by dirt pedestrian path, sunny summer day in Givet, Ardennes department, France
Drone aerial view over the old magazine fort in Phoenix Park, Dublin, on a bright sunny day with green grassy slopes all around
La Fortification, Fort Saint Pierre at sunset. Maastricht. The Netherlands.
The old prison in Ponta Delgada the main city on the Portuguese Azorean Island San Miguel in the center of the North Atlantic Ocean
Stone paved road to Citadel of Namur Citadelle de Namur with stone wall and arch entrance, fortress on hill, green trees in old town Namur historical city centre, Wallonia, Walloon Region, Belgium
Detail of the Steep Walls of 17th Century naval fortress in Plymouth
Citadel Hill in Halifax is a fortress and a national historic site.  Aerial view showing the star shape of the walls, grass and some of the downtown city.
medieval city walls with green trees below
Namur, Belgium - December 02 2013: The Citadel or Castle of Namur is a fortress in the city of Namur, at the confluence of the Sambre and Meuse rivers
View From Gate To Kalemegdan In Belgrade, Serbia
Fort Sint Pieter Near Maastricht Netherlands On A Beautiful Sunny Autumn Day With A Clear Blue Sky
Aerial view of Fort Chambly during sunset summer by the Richelieu river
Old houses on the surrounding city wall in Maastricht, Netherlands
St. George's Island,  Bermuda: Fort St. Catherine, coastal artillery fort at the North-East tip of St. George's Island, in the Imperial fortress colony of Bermuda - The first wooden fort was built on the site in 1612, the current structure dates mostly from the 19th century - Coot Pond Road - UNESCO World Heritage Site.
Panoramic view of Namur in Belgium on July 22, 2023.
monumental Oostpoort (Eastern Gate) at Delft; Delft, Netherlands
prison bars on window in old stone wall
Gardens and back of Rubens house in Antwerp. Peter Paul Rubens lived in this house and studio that he designed from 1616 to 1640.
Monument in Dinant relating to the First World War
Panoramic view of the perimeter walls of a disused magazine fort in Phoenix Park, Dublin, on a bright sunny day with green grassy slopes and crumbling bricks
Porte de Gand Gate of Gent brick building, entrance in Lille city, Vieux Lille old town quarter historical center, French Flanders, Nord department, Hauts-de-France Region, Northern France
Daun, Germany - April 20, 2023.  Engineer at work high up  to  do maintenance at a communication antenna in the historical Eifel Region City of Daun.
Namur, Wallonia / Belgium - June 18, 2017: the city of Namur in spring.
Paramaribo, Suriname: Fort Zeelandia - built in the early 17th century, when Dutch settlers founded a trading settlement near the indigenous village of Parmurbo, later Paramaribo. The English captured the fort in 1651 and named it Fort Willoughby, after Francis Willoughby. In March 1667, the Zeelanders under Abraham Crijnssen conquered the fort and the settlement. After Suriname's independence (1975) it was used to hold and torture political prisoners - Abraham Crijnssenweg, Historic Inner City of Paramaribo, Unesco World Heritage Site.
Citadel of Namur fortress walls with curved road and Meuse river  with city panorama, Namur, Wallonia, Belgium
View of Valença do Minho fortaleza doorway in surrounding walls, 12th-13th  century. Entrance stone arch, Minho, Portugal.
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