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Diyarbakır Castle in Turkey. The surrounding walls of Diyarbakir City is the longest wall after China Wall.
Mehrangarh Fort
Limassol, Cyprus - May 20, 2023: Landscape with Kolossi castle, Limassol, Cyprus
Drone view of Gjirokaster
Remains of the palace of the vanished Chervonograd town located in Ternopil region, near the village of Nyrkiv, in Zalischyky district.
The Great Wall of Jinshanling
Sea side view to old fortress of Alanya, Turkey.
Carpenti, Italy - October 29, 2014: The Castello di Carpineti, whose date of construction remains uncertain, was owned by the Countess Matilde di Canossa, who in 1077 welcomed Pope Gregory VII. Today remain only scenographic ruins.
Bhaktapur, Nepal - oct 28, 2019: the inner courtyards of a monastery and Buddhist school of Bhaktapur:  they were completely restored afterwards the 2015 earthquake, Bhaktapur,
An ancient fortress on the hills of Bosphorus in Istanbul Turkey, as seen from Bosphorus in spring time.
Spinalonga Fortress, built in the 16th century by the Venetians, in Kalydon, Crete, Greece.
Old town in Albania
Ljubljana, Slovenia - June 27, 2023: The castle of Ljubljana is the biggest one and the most-visited of the castles in Slovenia’s capital city. Ljubljana Castle (Slovene: Ljubljanski grad)
The Great Wall in summer, Jinshanling, China
Tourists visiting Kruje Castle and its fortress with walls. Albania
The Great Wall of China covered in light snow
Blue wall of Chefchaouen, small town in northwest Morocco famous by its blue buildings
Austrohungarian fortress, once used as border guard.
Divrigi Castle In Divrigi image Sivas Turkey
The ruins of the old city fortress in Belgrade, Serbia that is now part of the central city.
Trieste, located in northeastern Italy, is a city with a unique blend of Italian, Central European, and Mediterranean influences. It boasts historic architecture, a vibrant cultural scene, and a rich maritime heritage due to its strategic location by the Adriatic Sea.
A panoramic view of the outside fortification wall of the Halifac Citadel during sunset
Aerial view of Kahta Castle.  The Yeni Kale Fortress in Eski Kahta is perched atop a hill with a steep slope. Close to Mount Nemrut. Anatolia. Turkey
Ancient Palamidi fortress in Nafplio, Greece
Medieval fort close to Rio de Janeiro.
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the royal fortification March 11, 2017 Cannes France
Medina del Campo, Spain : July 13th of 2018 The castle of La Mota in Medina del Campo Valladolid Castile and Leon Spain is a fortress build in the XIV century . It is characterized by the mudejar style architecture and is considered a property of special  Cultural interest since 1931. Now it can be visited and is a popular touristic attraction.
Some structures built as churches in Cyprus were converted into mosques by the Turks.
Aigues-Mortes, ancient walled town
Free Images: "bestof:Mangup Citadel 3.jpg Main citadel of Mangup Own 2006-06-18 Sagqs Public Domain Mangup"
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The Way to the Citadel, Paul Klee, 1937, oil on canvas mounted on cardboard - Phillips Collection - DSC04920.JPG
On the Way between Old and New Cairo, Citadel Mosque of Mohammed Ali, and Tombs of the Mamelukes, by Louis Comfort Tiffany, 1872, oil on canvas - Brooklyn Museum - Brooklyn, NY - DSC08252.JPG
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