fortification
military constructions and buildings designed for defense in warfare and military bases
landwehr
border demarcations or border defences and enclosures in Central Europe
Fortifications of Braunschweig
city wall
border barrier
wall or barrier at national boundaries
ribat
small fortification
Fortaleza de San Fernando
fortification in Honduras
fortified church
church built to play a defensive role in time of conflict
Ita Fort
fort in Arunachal Pradesh, India
Molotov Line
system of border fortifications built by the Soviet Union
Donjon Ter Heyden
keep in Belgium
fortresses of Attica
chain of ancient forts on borders of Attica
coastal defence and fortification
military operations and doctrine regarding protection of coastlines against military attack
Square Tower
fortification in Portsmouth, England
Citadel of Riga
former fortress in Riga, Latvia
fortifications of Maastricht
Netherlands
Haller
fortification in Monschau, Germany
Gurit Castle
cultural Monument in Albania
Cerro del Moro
cultural property in Almonaster la Real, Spain
Holy Spirit Fort
fort of the Russian Empire
castle
type of fortified structure built in Europe, Asia and the Middle East during the Middle Ages by nobility
pillbox
concrete dug-in guard posts, normally equipped with loopholes through which to fire weapons
Old City of Baku
the historical core of Baku, World Heritage Site
Median Wall
wall built to the north of Babylon
Eternal Golden Castle
fortification
missile launch facility
underground structure for the storage and launching of intercontinental ballistic missiles
Defence Line of Amsterdam
fortification line in the Netherlands
Warsaw Barbican
barbican
lilia
defensive pit traps used by Roman armies
principia
Roman military headquarters building; in older publications such buildings were sometimes referred to as 'praetorium'
Security Position North
German WW1 defensive line across southern Denmark
tata
West African fortification
Catherine's Hill
fortification, architectural landmark, destroyed building or structure in Veliky Novgorod, Russia
Royal Walls
Set of fortifications in the Spanish city of Ceuta
Fortifications of Bucharest
Military fortifications in Bucharest, Romania
Fortress of Santa Catalina
fortress of Las Palmas de Gran Canaria