This is a list of fortifications past and present, a fortification being a major physical defensive structure often composed of a more or less wall-connected series of forts.
Individual fortifications
listed by name A Famosa, built in the 16th century in Malacca by the Portuguese following their defeat of the Malaccan Sultanate Alderney Alpine Wall Anastasian Wall, built in the 5th century across the Thracian peninsula for the protection of Constantinople Antonine Wall, built by the Romans in northern Britain Babylon Fortress in Old Cairo. Baggush Box Bar Lev Line Beijing city fortifications British anti-invasion preparations of the Second World War British hardened field defences of World War II Castle of Bouka, Preveza, Greece Brimstone Hill Fortress, Saint Thomas Middle Island, Saint Kitts and Nevis Cairo Citadel, Egypt Çakmak Line Castle Islands Fortifications, Bermuda Chester city walls, Chester, England Corradino Lines, Paola, Malta Cottonera Lines, Cottonera, Malta Czechoslovak border fortifications Danevirke Devils Battery, Halifax Harbour, Nova Scotia Defense line of Amsterdam The Dutch Water Line, protecting the core provinces of the Netherlands, utilising the flooding of areas with water Elvas Fortifications, the largest bulwarked dry ditch system in the world, protecting the Portuguese garrison border town of Elvas Fortified district Molotov Line Stalin Line German World War II fortresses / Fortress Europe Alpine Fortress Atlantic Wall Festung Norwegen Festungsfront Oder-Warthe-Bogen Siegfried Line Floriana Lines, Floriana, Malta Fort Carré Fort Jesus, built in the 15th century in Mombassa by the Portuguese Fortress of Humaitá, 19th century gateway to Paraguay. Götavirke (Sweden) Great Wall of China, built as a protection from the northern steppe nomads Great Abatis Border Gustav Line, a fortified German defensive line in Italy during the Second World War Hadrian's Wall, built by the Romans in northern Britain Hexamilion wall, built across the Isthmus of Corinth Hilsea Lines, built to protect Portsmouth Hindenburg line Hindenburg Wall Intramuros, Manila Justinian Walls (in several locations along the borders of the Byzantine Empire) Klis Fortress in Croatia Krepost Sveaborg, Imperial Russian First World War fortifications around Helsinki Limes Germanicus, Roman defensive line along the Rhine and in South-western Germany Limes Moesiae - defensive frontier system in Southeast Europe, a collection of Roman fortifications between the Black Sea shore and Pannonia, present-day Hungary, consisting primarily of forts along the Danube (so-called Danubian Limes) to protect the Roman provinces of Upper and Lower Moesia south of the river Lines of Torres Vedras, built to protect the Lisbon Region, during the Peninsular War London Wall, the Roman wall around the city Maginot Line, built by France in the 1930s Mannerheim Line, built by Finland across the Karelian Isthmus Metaxas Line, built during 1936–1940 by Greece along its frontier with Bulgaria Montségur National Redoubt (Belgium) Newcastle town wall Offa's Dyke, an 8th-century earthwork dividing England and Wales Grim's Ditch Per Albin Line (Sweden) Petrovaradin fortress, in Northern Serbia, Austrian fortress from the 18th century Rupel Fortress, in Northern Greece, later incorporated in the Metaxas Line Rupnik Line Santa Margherita Lines, in Cospicua, Malta Saxon Shore, in southern Britain and northern France Suomenlinna, an 18th-century fortress in Helsinki Toblerone line Valtellina Redoubt Victoria Lines, in northern Malta York city walls
Articles relating to cities
Europe Ceintures de Lyon, built in the 19th century to surround the city of Lyon, France Walled city of Jajce, Bosnia Walled city of Počitelj, Bosnia Walled city of Vratnik, Bosnia Walls of Constantinople (modern day Istanbul), surrounding the city since the 4th century Walls of Dubrovnik, Croatia Roman walls of Lugo, Galicia, surrounding the city since the 1st century Walls of Ávila, Spain Walls of Nicosia, Cyprus Walls of Ston, Croatia Fortifications of Antwerp, Belgium Fortifications of Birgu, Malta Fortifications of Chania, Crete, Greece Fortifications of Famagusta, Cyprus Fortifications of Heraklion, Crete, Greece Fortifications of London, England Lines of Communication (London), English Civil War fortifications built around London between 1642 and 1643 London Defence Positions Outer London Defence Ring Military citadels under London Fortifications of Kotor, Montenegro Fortifications of Mdina, Malta Fortifications of Messina, Sicily, Italy Fortifications of Metz, France Fortifications of Portsmouth, England Fortifications of Senglea, Malta Fortifications of Valletta, Malta Defence lines of the Netherlands List of town walls in England and Wales Rocca di Manerba del Garda (Lombardy), Italy
Africa
Egypt
See also List of buildings List of castles List of forts List of walls List of cities with defensive walls List of established military terms (Engineering) Martello tower