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Beaumaris Castle, located on Anglesey, Wales, was built from 1295 CE by Edward I of England (r. 1272-1307 CE) to protect his territorial gains in the region. The castle featured the latest defensive designs of the period such as round towers...

The Kremlin is a fortified complex located in the centre of Moscow, Russia, which is made up of towers, high walls, palaces, and cathedrals. Construction of the Kremlin began as early as the 12th century. As one of Russia's most famous landmarks...

Hovenweep or Hovenweep National Monument is comprised of the ruins of six Ancestral Puebloan (or Anasazi) villages located on the border between southwestern Colorado and southeastern Utah in what is the present-day United States. The home...

Siege tactics were a crucial part of medieval warfare, especially from the 11th century CE when castles became more widespread in Europe and sieges outnumbered pitched battles. Castles and fortified cities offered protection to both the local...

Herod's Harbor was a giant port built between 22 and 15 BCE by Herod the Great (r. 37-4 BCE), Rome's client king. Situated on the lower eastern Mediterranean coast north of Alexandria and south of Tyre, with Rome's largess and building skills...

The keep, located within a courtyard and surrounded by a curtain wall, was the heart of a medieval castle. The hall keep was a low building while the tower keep or donjon could have three or more floors and be topped by turrets and battlements...

Dover Castle, located in the southern county of Kent, is one of the largest castles in England and one of the first to have concentric defensive walls. First built in 1066 CE by William the Conqueror to help prevent anyone repeating his own...

Conwy Castle (aka Conway Castle), located in North Wales, was built by Edward I of England (r. 1272-1307 CE) from 1283 to 1292 CE to protect and maintain, along with several other castles, his newly acquired dominance in the region. Built...

Britain's integrated air defence system in the Second World War (1939-45), known as the Dowding System after the air chief marshal of that name, included code-breakers, radar stations, observers, searchlights, barrage balloons, anti-aircraft...

Krak des Chevaliers (also spelt Cracs des Chevaliers, and known in Arabic as Hisn al-Akrad) is a castle in Syria originally built for the Emir of Aleppo in 1031 CE but acquired and extensively rebuilt by the Knights Hospitaller in 1144 CE...