Defensive facilities posters & prints

Grianan of Aileach Anonymous

Rock of Cashel Anonymous

Housesteads Fort and Hadrian's Wall Anonymous

Fort Ladder 1 David Roseburg

Broadway Tower Anonymous

Round Tower at Rock of Cashel Anonymous

Dover Castle Anonymous

San Francisco Bay, 1937 Anonymous

Fog Rolling Under Golden Gate Bridge Anonymous

The Great Wall of China Anonymous

World War Destroyer Ships Anonymous

Walled Hillside Town of Monteriggioni, Italy in Spring Green Anonymous

Sant'Angelo Bridge and Castel Sant'Angelo at night Anonymous

La Defence Joas Souza

Artillery Towers in the Thames Estuary Anonymous

Great Wall of China Anonymous

View of Siegfried Line Anonymous

The War on the Punjaub Frontier: The Fortress of Attock, Pakistan, 1868 Anonymous

Cesis Medieval Castle, Cesis, Latvia Anonymous

Fort Qa'it Bey in Alexandria Anonymous

Bodiam Castle and Moat Anonymous

The church of Les Saintes-Maries-de-la-Mer Anonymous

Interior of Fort Sumpte, shewing (i.e Anonymous

Design for a Fortification on the Outskirts of Paris - a Perspective View, Section and Three Floor Plans of the... French School

The Solidor Tower, St. Malo, 1882 John Mulcaster Carrick

Fortification Work at the Gate of Clignancourt Paris, France Anonymous

Aerial view of Peel Castle taken from the west Manx Technical Publications Ltd

Entrance to the Fort de Salses, built 1497-1504 Francisco Ramirez

The Defence of the Trinity Sergius Cloister in Zagorsk, 1892 Sergei Dmitrievich Miloradovich

Walls of the Pingyao ancient city Anonymous

Aerial View of Launch Facilities at Peenemunde Anonymous

Cahir Castle Anonymous

Warehouse Facilities in Guantanamo Anonymous

Radio transmission facility in Norddeich, Germany, c.1933 German Photographer

Crawler moving Space Shuttle to launch complex 39, Kennedy Space Center, USA, 1980s NASA

View of Sevastopol, 1855 Lavrenty Avksentyevich Seryakov